diff --git a/gnu/local.mk b/gnu/local.mk
index 74d898c116..3cdf5e45ed 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -489,7 +489,11 @@ dist_patch_DATA =						\
   gnu/packages/patches/ghostscript-CVE-2015-3228.patch		\
   gnu/packages/patches/ghostscript-runpath.patch		\
   gnu/packages/patches/glib-networking-ssl-cert-file.patch	\
+  gnu/packages/patches/glib-tests-desktop.patch			\
+  gnu/packages/patches/glib-tests-homedir.patch			\
+  gnu/packages/patches/glib-tests-prlimit.patch			\
   gnu/packages/patches/glib-tests-timer.patch			\
+  gnu/packages/patches/glib-tests-gapplication.patch		\
   gnu/packages/patches/glibc-CVE-2015-7547.patch		\
   gnu/packages/patches/glibc-bootstrap-system.patch		\
   gnu/packages/patches/glibc-hurd-extern-inline.patch		\
@@ -517,7 +521,6 @@ dist_patch_DATA =						\
   gnu/packages/patches/guile-relocatable.patch			\
   gnu/packages/patches/guile-rsvg-pkgconfig.patch		\
   gnu/packages/patches/gtk2-respect-GUIX_GTK2_PATH.patch	\
-  gnu/packages/patches/gtk2-theme-paths.patch			\
   gnu/packages/patches/gtk3-respect-GUIX_GTK3_PATH.patch	\
   gnu/packages/patches/gtkglext-disable-disable-deprecated.patch \
   gnu/packages/patches/hop-bigloo-4.0b.patch			\
diff --git a/gnu/packages/fontutils.scm b/gnu/packages/fontutils.scm
index 05adc71212..5f6ff15935 100644
--- a/gnu/packages/fontutils.scm
+++ b/gnu/packages/fontutils.scm
@@ -46,21 +46,23 @@
 (define-public freetype
   (package
    (name "freetype")
-   (version "2.6.3")
+   (version "2.6")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://savannah/freetype/freetype-"
                                 version ".tar.bz2"))
             (sha256 (base32
-                     "18k3b026762lmyrxfil5xv8qwnvj7hc12gz9bjqzbb12lmx707ip"))))
+                     "0zilx15fwcpa8hmcxpc423jwb8ijw4qpq968kh18akvn4j0znsc4"))))
    (build-system gnu-build-system)
-   (native-inputs
-    `(("pkg-config" ,pkg-config)))
-   (propagated-inputs
-    ;; These are all in the Requires.private field of freetype2.pc.
-    ;; XXX: add harfbuzz.
-    `(("libpng" ,libpng)
-      ("zlib" ,zlib)))
+   (arguments
+    `(#:phases
+       ;; This should not be necessary; reported upstream as
+       ;; https://savannah.nongnu.org/bugs/index.php?44261
+       (alist-cons-before
+        'configure 'set-paths
+        (lambda _
+          (setenv "CONFIG_SHELL" (which "bash")))
+        %standard-phases)))
    (synopsis "Font rendering library")
    (description
     "Freetype is a library that can be used by applications to access the
@@ -359,15 +361,16 @@ applications should be.")
 (define-public graphite2
   (package
    (name "graphite2")
-   (version "1.3.8")
+   (version "1.3.6")
    (source
      (origin
        (method url-fetch)
-       (uri (string-append "https://github.com/silnrsi/graphite/releases/"
-                           "download/" version "/" name "-" version ".tgz"))
+       (uri (string-append "https://github.com/silnrsi/graphite/archive/"
+                           version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
        (sha256
         (base32
-         "1hlc9j7w7gihy6gvzfa7902pr6yxq1sr1xkp5rwf0p29m2rjagwz"))))
+         "1frd9mjaqzvh9gs74ngc43igi53vzjzlwr5chbrs6ii1hc4aa23s"))))
    (build-system cmake-build-system)
    (native-inputs
     `(("python" ,python-2) ; because of "import imap" in tests
diff --git a/gnu/packages/glib.scm b/gnu/packages/glib.scm
index 70020520eb..e7e9df8dff 100644
--- a/gnu/packages/glib.scm
+++ b/gnu/packages/glib.scm
@@ -35,7 +35,6 @@
   #:use-module (gnu packages gettext)
   #:use-module (gnu packages gtk)
   #:use-module (gnu packages libffi)
-  #:use-module (gnu packages pcre)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages python)
@@ -60,7 +59,7 @@
 (define dbus
   (package
     (name "dbus")
-    (version "1.10.8")
+    (version "1.10.0")
     (source (origin
               (method url-fetch)
               (uri (string-append
@@ -68,7 +67,7 @@
                     version ".tar.gz"))
               (sha256
                (base32
-                "0560y3hxpgh346w6avcrcz79c8ansmn771y5xpcvvlr6m8mx5wxs"))
+                "0jwj7wlrhq5y0fwfh8k2d9rgdpfax06lj8698g6iqbwrzd2rgyqx"))
               (patches (search-patches "dbus-helper-search-path.patch"))))
     (build-system gnu-build-system)
     (arguments
@@ -130,7 +129,7 @@ shared NFS home directories.")
 (define glib
   (package
    (name "glib")
-   (version "2.48.0")
+   (version "2.46.1")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/"
@@ -138,14 +137,16 @@ shared NFS home directories.")
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "0d3w2hblrw7vvpx60l1kbvb830ygn3v8zhwdz65cc5593j9ycjvl"))
-            (patches (search-patches "glib-tests-timer.patch"))))
+              "1yzxr1ip3l0m9ydk5nq32piq70c9f17p5f0jyvlsghzbaawh67ss"))
+            (patches (search-patches "glib-tests-homedir.patch"
+                                     "glib-tests-desktop.patch"
+                                     "glib-tests-prlimit.patch"
+                                     "glib-tests-timer.patch"
+                                     "glib-tests-gapplication.patch"))))
    (build-system gnu-build-system)
    (outputs '("out"           ; everything
               "bin"           ; glib-mkenums, gtester, etc.; depends on Python
               "doc"))         ; 20 MiB of GTK-Doc reference
-   (propagated-inputs
-    `(("pcre" ,pcre))) ; in the Requires.private field of glib-2.0.pc
    (inputs
     `(("coreutils" ,coreutils)
       ("libffi" ,libffi)
@@ -159,87 +160,29 @@ shared NFS home directories.")
       ("perl" ,perl)                              ; needed by GIO tests
       ("bash" ,bash)))
    (arguments
-    '(#:phases
-      (modify-phases %standard-phases
-        (add-before 'build 'pre-build
-          (lambda* (#:key inputs outputs #:allow-other-keys)
-            ;; For tests/gdatetime.c.
-            (setenv "TZDIR"
-                    (string-append (assoc-ref inputs "tzdata")
-                                   "/share/zoneinfo"))
+    '(#:phases (alist-cons-before
+                'build 'pre-build
+                (lambda* (#:key inputs outputs #:allow-other-keys)
+                  ;; For tests/gdatetime.c.
+                  (setenv "TZDIR"
+                          (string-append (assoc-ref inputs "tzdata")
+                                         "/share/zoneinfo"))
 
-            ;; Some tests want write access there.
-            (setenv "HOME" (getcwd))
-            (setenv "XDG_CACHE_HOME" (getcwd))
+                  ;; Some tests want write access there.
+                  (setenv "XDG_CACHE_HOME" (getcwd))
 
-            (substitute* '("glib/gspawn.c"
-                           "glib/tests/utils.c"
-                           "tests/spawn-test.c")
-              (("/bin/sh")
-               (string-append (assoc-ref inputs "bash") "/bin/sh")))))
-        (add-before 'check 'disable-failing-tests
-          (lambda _
-            (let ((disable
-                   (lambda (test-file test-paths)
-                     (define pattern+procs
-                       (map (lambda (test-path)
-                              (cons
-                               ;; XXX: only works for single line statements.
-                               (format #f "g_test_add_func.*\"~a\".*" test-path)
-                               (const "")))
-                            test-paths))
-                     (substitute test-file pattern+procs)))
-                  (failing-tests
-                   '(("glib/tests/thread.c"
-                      (;; prlimit(2) returns ENOSYS on Linux 2.6.32-5-xen-amd64
-                       ;; as found on hydra.gnu.org, and strace(1) doesn't
-                       ;; recognize it.
-                       "/thread/thread4"))
+                  (substitute* '("glib/gspawn.c"
+                                 "glib/tests/utils.c"
+                                 "tests/spawn-test.c")
+                    (("/bin/sh")
+                     (string-append (assoc-ref inputs "bash") "/bin/sh")))
 
-                     ("glib/tests/timer.c"
-                      (;; fails if compiler optimizations are enabled, which they
-                       ;; are by default.
-                       "/timer/stop"))
-
-                     ("gio/tests/gapplication.c"
-                      (;; XXX: proven to be unreliable.  See:
-                       ;;  <https://bugs.debian.org/756273>
-                       ;;  <http://bugs.gnu.org/18445>
-                       "/gapplication/quit"
-
-                       ;; XXX: fails randomly for unknown reason. See:
-                       ;;  <https://lists.gnu.org/archive/html/guix-devel/2016-04/msg00215.html>
-                       "/gapplication/local-actions"))
-
-                     ("gio/tests/contenttype.c"
-                      (;; XXX: requires shared-mime-info.
-                       "/contenttype/guess"
-                       "/contenttype/subtype"
-                       "/contenttype/list"
-                       "/contenttype/icon"
-                       "/contenttype/symbolic-icon"
-                       "/contenttype/tree"))
-
-                     ("gio/tests/appinfo.c"
-                      (;; XXX: requires update-desktop-database.
-                       "/appinfo/associations"))
-
-                     ("gio/tests/desktop-app-info.c"
-                      (;; XXX: requires update-desktop-database.
-                       "/desktop-app-info/delete"
-                       "/desktop-app-info/default"
-                       "/desktop-app-info/fallback"
-                       "/desktop-app-info/lastused"
-                       "/desktop-app-info/search"))
-
-                     ("gio/tests/gdbus-peer.c"
-                      (;; Requires /etc/machine-id.
-                       "/gdbus/codegen-peer-to-peer"))
-
-                     ("gio/tests/gdbus-unix-addresses.c"
-                      (;; Requires /etc/machine-id.
-                       "/gdbus/x11-autolaunch")))))
-              (and-map (lambda (x) (apply disable x)) failing-tests)))))
+                  ;; Disable a test that requires dbus.
+                  (substitute* "gio/tests/gdbus-serialization.c"
+                    (("g_test_add_func \
+\\(\"/gdbus/message-serialize/double-array\", test_double_array\\);" all)
+                     (string-append "/* " all " */"))))
+                %standard-phases)
 
       ;; Note: `--docdir' and `--htmldir' are not honored, so work around it.
       #:configure-flags (list (string-append "--with-html-dir="
@@ -275,14 +218,14 @@ dynamic loading, and an object system.")
 (define gobject-introspection
   (package
     (name "gobject-introspection")
-    (version "1.48.0")
+    (version "1.46.0")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnome/sources/"
                    "gobject-introspection/" (version-major+minor version)
                    "/gobject-introspection-" version ".tar.xz"))
              (sha256
-              (base32 "0xsqwxhfqzr79av89mg766kxpb2i41bd0vwspk01xjdzrnn5l9zs"))
+              (base32 "0cs27r18fga44ypp8icy62fwx6nh70r1bvhi4lzfn4w85cybsn36"))
              (modules '((guix build utils)))
              (snippet
               '(substitute* "tools/g-ir-tool-template.in"
@@ -294,6 +237,7 @@ dynamic loading, and an object system.")
     (build-system gnu-build-system)
     (inputs
      `(("bison" ,bison)
+       ("cairo" ,cairo)
        ("flex" ,flex)
        ("glib" ,glib)
        ("python-2" ,python-2)))
@@ -451,7 +395,7 @@ by GDBus included in Glib.")
 (define libsigc++
   (package
     (name "libsigc++")
-    (version "2.8.0")
+    (version "2.6.1")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnome/sources/libsigc++/"
@@ -459,7 +403,7 @@ by GDBus included in Glib.")
                                  name "-" version ".tar.xz"))
              (sha256
               (base32
-               "0lcnzzdq6718znfshs1hflpwqq6awbzwdyp4kv5lfaf54z880jbp"))))
+               "06xyvxaaxh3nbpjg86gcq5zcc2qnpx354wcfrqlhbndkq5kj2vqq"))))
     (build-system gnu-build-system)
     (native-inputs `(("pkg-config" ,pkg-config)
                      ("m4" ,m4)))
@@ -478,7 +422,7 @@ has an ease of use unmatched by other C++ callback libraries.")
 (define glibmm
   (package
     (name "glibmm")
-    (version "2.48.1")
+    (version "2.46.3")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnome/sources/glibmm/"
@@ -486,7 +430,7 @@ has an ease of use unmatched by other C++ callback libraries.")
                                  "/glibmm-" version ".tar.xz"))
              (sha256
               (base32
-               "1pvw2mrm03p51p03179rb6fk9p42iykkwj1jcdv7jr265xymy8nw"))))
+               "1kw65mlabwdjw86jybxslncbnnx40hcx4z6xpq9i4ymjvsnm91n7"))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases (alist-cons-before
@@ -559,7 +503,7 @@ useful for C++.")
 (define-public python-pygobject
   (package
     (name "python-pygobject")
-    (version "3.20.0")
+    (version "3.18.0")
     (source
      (origin
        (method url-fetch)
@@ -568,7 +512,7 @@ useful for C++.")
                            "/pygobject-" version ".tar.xz"))
        (sha256
         (base32
-         "0ikzh3l7g1gjh8jj8vg6mdvrb25svp63gxcam4m0i404yh0lgari"))))
+         "1jbd2m39vcjh5h3m33l0317ziq8dxfzi40r6hrfcs4rp5l8s2fqw"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("which" ,which)
diff --git a/gnu/packages/gnome.scm b/gnu/packages/gnome.scm
index 4272493872..0fd1d5bb29 100644
--- a/gnu/packages/gnome.scm
+++ b/gnu/packages/gnome.scm
@@ -188,7 +188,7 @@ commonly used macros.")
 (define-public gnome-desktop
   (package
     (name "gnome-desktop")
-    (version "3.20.0")
+    (version "3.18.1")
     (source
      (origin
       (method url-fetch)
@@ -197,7 +197,7 @@ commonly used macros.")
                           name "-" version ".tar.xz"))
       (sha256
        (base32
-        "13dhvax8fy9qkna4dphb7b5fxn3dsk818p3q8b92a7nrrwcgiiqq"))))
+        "0avpmyhzz5b3pyfpkp8iq5ym5r5w7zs3a396hqkdpdsiym0vrazc"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("gobject-introspection" ,gobject-introspection)
@@ -265,7 +265,7 @@ and keep up to date translations of documentation.")
 (define-public gcr
   (package
     (name "gcr")
-    (version "3.20.0")
+    (version "3.18.0")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnome/sources/" name "/"
@@ -273,7 +273,7 @@ and keep up to date translations of documentation.")
                                  name "-" version ".tar.xz"))
              (sha256
               (base32
-               "0ydk9dzxx6snxza7j5ps8x932hbr3x1b8hhcaqjq4w4admi2qmwh"))))
+               "006f6xbd3jppkf9avg83mpqdld5d0z6mr0sm81lql52mmyjnvlfl"))))
     (build-system gnu-build-system)
     (arguments
      '(#:tests? #f ;25 of 598 tests fail because /var/lib/dbus/machine-id does
@@ -342,7 +342,7 @@ GNOME Desktop.")
 (define-public gnome-keyring
   (package
     (name "gnome-keyring")
-    (version "3.20.0")
+    (version "3.18.3")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnome/sources/" name "/"
@@ -350,7 +350,7 @@ GNOME Desktop.")
                                  name "-" version ".tar.xz"))
              (sha256
               (base32
-               "16gcwwcg91ipxjmiyi4c4njvnxixmv1i278p0bilc3lafk6ww5xw"))))
+               "167dq1yvm080g5s38hqjl0xx5cgpkcl1xqy9p5sxmgc92zb0srrz"))))
     (build-system gnu-build-system)
     (arguments
      `(#:tests? #f ;48 of 603 tests fail because /var/lib/dbus/machine-id does
@@ -410,7 +410,7 @@ forgotten when the session ends.")
 (define-public evince
   (package
     (name "evince")
-    (version "3.20.0")
+    (version "3.18.1")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnome/sources/" name "/"
@@ -418,7 +418,7 @@ forgotten when the session ends.")
                                  name "-" version ".tar.xz"))
              (sha256
               (base32
-               "1052lm4i5qq27sgk6ck5xc1cxh0qx4zzhifjhmzjlv38afj5i0yg"))))
+               "0cccmbvl1b6d2976642iyfr8g3r69zf3mzl2ln6vjvvdbrv26l3v"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      `(#:configure-flags '("--disable-nautilus")
@@ -474,7 +474,7 @@ on the GNOME Desktop with a single simple application.")
 (define-public gsettings-desktop-schemas
   (package
     (name "gsettings-desktop-schemas")
-    (version "3.20.0")
+    (version "3.18.0")
     (source
      (origin
       (method url-fetch)
@@ -483,7 +483,7 @@ on the GNOME Desktop with a single simple application.")
                           name "-" version ".tar.xz"))
       (sha256
        (base32
-        "1hfrqqsmqscgbnaikmyq4yq8h72554wdg13algh5bf8a7i9ip92m"))))
+        "1szc857f46spdhrbnq9ci3kwfqg5vwpikbf0hprq6vd94rr369xs"))))
     (build-system gnu-build-system)
     (inputs
      `(("glib" ,glib)))
@@ -599,7 +599,7 @@ update-desktop-database: updates the database containing a cache of MIME types
 (define-public adwaita-icon-theme
   (package (inherit gnome-icon-theme)
     (name "adwaita-icon-theme")
-    (version "3.20")
+    (version "3.18.0")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -607,19 +607,19 @@ update-desktop-database: updates the database containing a cache of MIME types
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0ddfwwqx8s63qbqimmbb015lqsab4s0rvy1j81jdsh7k95rqh2ks"))))))
+                "0n0fqlg55krw8pgn4z2vxnxh65lyvcydqkrr7klqxp8z00kfg72y"))))))
 
 (define-public shared-mime-info
   (package
     (name "shared-mime-info")
-    (version "1.6")
+    (version "1.2")
     (source (origin
              (method url-fetch)
              (uri (string-append "https://freedesktop.org/~hadess/"
                                  "shared-mime-info-" version ".tar.xz"))
              (sha256
               (base32
-               "0k637g047gci8g69bg4g19akylpfraxm40hd30j3i4v7cidziy5j"))))
+               "0y5vi0vr6rbhvfzcfg57cfskn362bpvcpca9cy598nmr87i6lld5"))))
     (build-system gnu-build-system)
     (arguments
      ;; The build system appears not to be parallel-safe.
@@ -697,7 +697,7 @@ some form of information without getting in the user's way.")
 (define-public libpeas
   (package
     (name "libpeas")
-    (version "1.18.0")
+    (version "1.16.0")
     (source
      (origin
       (method url-fetch)
@@ -706,7 +706,7 @@ some form of information without getting in the user's way.")
                           name "-" version ".tar.xz"))
       (sha256
        (base32
-        "09jy2rwwgp0xx7cnypxl56m7zzxnj3j4v58xqjxjasf3chn88jdz"))))
+        "0kj5n5hz93xq7qdb2r7n86nibzwqjr88jxaih1fdbxv5rn7014xh"))))
     (build-system gnu-build-system)
     (inputs
      `(("atk" ,atk)
@@ -760,7 +760,7 @@ API add-ons to make GTK+ widgets OpenGL-capable.")
 (define-public glade3
   (package
     (name "glade")
-    (version "3.20.0")
+    (version "3.18.3")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -768,8 +768,8 @@ API add-ons to make GTK+ widgets OpenGL-capable.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1zhqvhagy0m85p54jfiayfl0v9af7g0lj7glw8sfwh7cbp56vnc2"))))
-    (build-system glib-or-gtk-build-system)
+                "0lk4nvd5s8px9i0pbq7bncikgn2lpx7vjh787d3cvzpvwx3cxnzc"))))
+    (build-system gnu-build-system)
     (arguments
      `(#:tests? #f ; needs X, GL, and software rendering
        #:phases
@@ -804,7 +804,7 @@ the GNOME desktop environment.")
 (define-public libcroco
   (package
     (name "libcroco")
-    (version "0.6.11")
+    (version "0.6.8")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -812,7 +812,7 @@ the GNOME desktop environment.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0mm0wldbi40am5qn0nv7psisbg01k42rwzjxl3gv11l5jj554aqk"))))
+                "0w453f3nnkbkrly7spx5lx5pf6mwynzmd5qhszprq8amij2invpa"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("pkg-config" ,pkg-config)))
@@ -834,7 +834,7 @@ XML/CSS rendering engine.")
 (define-public libgsf
   (package
     (name "libgsf")
-    (version "1.14.36")
+    (version "1.14.34")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -842,7 +842,7 @@ XML/CSS rendering engine.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0h19ssxzz0cmznwga2xy55kjibm24mwxqarnpd0w7xy0hrzm1dvi"))))
+                "0a5m1i5gp4m2z0cn2x1rrdm8wgrr04bzv65l8pgp6jipw13s9zph"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("intltool" ,intltool)
@@ -867,7 +867,7 @@ dealing with different structured file formats.")
 (define-public librsvg
   (package
     (name "librsvg")
-    (version "2.40.15")
+    (version "2.40.13")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -875,7 +875,7 @@ dealing with different structured file formats.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1x05vd2llpmskq3prkp7kbpmshmpp9whj4kfl99ybipf4fhw9jnr"))))
+                "014q7gz6mgfa7pfn0lr13qqv568ad8j1sw9d4vksnpazq0zajvjd"))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases
@@ -1339,7 +1339,14 @@ widgets built in the loading process.")
                                   name "-" version ".tar.bz2"))
               (sha256
                (base32
-                "129ka3nn8gx9dlfry17ib79azxk45wzfv5rgqzw6dwx2b5ns8phm"))))
+                "129ka3nn8gx9dlfry17ib79azxk45wzfv5rgqzw6dwx2b5ns8phm"))
+              (modules '((guix build utils)))
+              (snippet
+               ;; Adapt to newer freetype. As the package is deprecated, there
+               ;; is no use in creating a patch and reporting it.
+               '(substitute* '("libgnomeprint/gnome-font-face.c"
+                               "libgnomeprint/gnome-rfont.c")
+                  (("freetype/") "freetype2/")))))
     (build-system gnu-build-system)
     (inputs
      `(("popt" ,popt)
@@ -1436,14 +1443,14 @@ controls using the Bonobo component framework.")
 (define-public libwnck
   (package
     (name "libwnck")
-    (version "3.14.1")
+    (version "3.14.0")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
                                   (version-major+minor version) "/"
                                   name "-" version ".tar.xz"))
               (sha256
-               (base32 "1ymya8gkjygvg0i901wr3q6ihfqxx5yf4g4pb6fag2iw8af3qr5v"))))
+               (base32 "074jww04z8g9r1acndqap79wx4kbm3rpkf4lcg1v82b66iv0027m"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("pkg-config" ,pkg-config)
@@ -1482,14 +1489,14 @@ Hints specification (EWMH).")
 (define-public goffice
   (package
     (name "goffice")
-    (version "0.10.28")
+    (version "0.10.24")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
                                   (version-major+minor version)  "/"
                                   name "-" version ".tar.xz"))
               (sha256
-               (base32 "12rsgxrixkfpk420gv026i74pnlgqjzsvm6vffrmih54w46hd3q6"))))
+               (base32 "0nmghi26dpjcw7knkviq031crhm0zjy4k650pv1jj3hb1fmhx9yd"))))
     (build-system gnu-build-system)
     (outputs '("out"
                "doc"))                            ;4.1 MiB of gtk-doc
@@ -1547,7 +1554,7 @@ Hints specification (EWMH).")
 (define-public gnumeric
   (package
     (name "gnumeric")
-    (version "1.12.28")
+    (version "1.12.24")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -1555,7 +1562,7 @@ Hints specification (EWMH).")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1fsdp7r6fhc0m3fb4ly4xwh83v3hp2zrv9d0713g4lcy709svm02"))))
+                "0lcm8k0jb8rd5y4ii803f21nv8rx6gc3mmdlrj5h0rkkn9qm57f5"))))
     (build-system gnu-build-system)
     (arguments
      `(;; The gnumeric developers don't worry much about failing tests.
@@ -1584,11 +1591,10 @@ Hints specification (EWMH).")
        ("libxml2" ,libxml2)
        ("libxslt" ,libxslt)
        ("python" ,python-2)
-       ("python2-pygobject" ,python2-pygobject)
+       ("python2-pygobject" ,python2-pygobject-2)
        ("zlib" ,zlib)))
     (native-inputs
-     `(("bison" ,bison)
-       ("intltool" ,intltool)
+     `(("intltool" ,intltool)
        ("glib:bin" ,glib "bin")
        ("pkg-config" ,pkg-config)))
     (home-page "http://www.gnumeric.org")
@@ -1606,7 +1612,7 @@ engineering.")
 (define-public gnome-themes-standard
   (package
     (name "gnome-themes-standard")
-    (version "3.20")
+    (version "3.18.0")
     (source
      (origin
        (method url-fetch)
@@ -1615,7 +1621,7 @@ engineering.")
                            version ".tar.xz"))
        (sha256
         (base32
-         "1p1vvmzfky1ax3yv9ld10xgqwydhmglxpgq3skrfc4539nrq9phw"))))
+         "1jxss8kxszhf66vic9n1sagczm5amm0mgxpzyxyjna15q82fnip6"))))
     (build-system gnu-build-system)
     (inputs
      `(("gtk+" ,gtk+)
@@ -1648,7 +1654,7 @@ engineering.")
 (define-public seahorse
   (package
     (name "seahorse")
-    (version "3.20.0")
+    (version "3.18.0")
     (source
      (origin
        (method url-fetch)
@@ -1657,7 +1663,7 @@ engineering.")
                            version ".tar.xz"))
        (sha256
         (base32
-         "1py6fj19kb8aaxvg6yrpd0876azc2zjvis98aqz37a2lxmhp9c72"))))
+         "0rxnq47xcagmpqb63g49ay3lfiyjjnmmiay9yifx5jn406d8h32k"))))
     (build-system glib-or-gtk-build-system)
     (inputs
      `(("gtk+" ,gtk+)
@@ -1684,7 +1690,7 @@ passwords in the GNOME keyring.")
 (define-public vala
   (package
     (name "vala")
-    (version "0.32.0")
+    (version "0.30.0")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -1692,7 +1698,7 @@ passwords in the GNOME keyring.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0vpvq403vdd25irvgk7zibz3nw4x4i17m0dgnns8j1q4vr7am8h7"))))
+                "1pyyhfw3zzbhxfscbn8xz70dg6vx0kh8gshzikpxczhg01xk7w31"))))
     (build-system gnu-build-system)
     (arguments
      '(#:phases
@@ -1724,7 +1730,7 @@ libraries written in C.")
 (define-public vte
   (package
     (name "vte")
-    (version "0.44.0")
+    (version "0.42.3")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -1732,16 +1738,8 @@ libraries written in C.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1ahjxysiv38q91gfq2wddcbvndlggfr8ynls25m42pw83akv38wk"))))
+                "1832mrw2hhgjipbsfsv2fmdnwnar4rkx589ciz008bg8x908mscn"))))
     (build-system gnu-build-system)
-    (arguments
-     ;; XXX: fails to compile tests with the default flags.
-     ;; vteconv.cc:774:40:
-     ;;    error: missing sentinel in function call [-Werror=format=]
-     ;;    g_test_init (&argc, &argv, NULL);
-     ;;
-     ;; cc1plus: some warnings being treated as errors
-     '(#:configure-flags '("CXXFLAGS=-Wformat=0")))
     (native-inputs
      `(("pkg-config" ,pkg-config)
        ("intltool" ,intltool)
@@ -1808,7 +1806,7 @@ editors, IDEs, etc.")
 (define-public dconf
   (package
     (name "dconf")
-    (version "0.26.0")
+    (version "0.24.0")
     (source (origin
               (method url-fetch)
               (uri (string-append
@@ -1817,7 +1815,7 @@ editors, IDEs, etc.")
                     name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1jaqsr1r0grpd25rbsc2v3vb0sc51lia9w31wlqswgqsncp2k0w6"))))
+                "1hpy6336f0pbkyranywm4872i5in0xn7jf40a66xdmzls77f0ws3"))))
     (build-system glib-or-gtk-build-system)
     (inputs
      `(("gtk+" ,gtk+)
@@ -1862,7 +1860,7 @@ configuration storage systems.")
 (define-public json-glib
   (package
     (name "json-glib")
-    (version "1.2.0")
+    (version "1.0.4")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -1870,7 +1868,7 @@ configuration storage systems.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1lx7p1c7cl21byvfgw92n8dhm09vi6qxrs0zkx9dg3y096zdzmlr"))
+                "1k85vvb2prmk8aa8hmr2rp9rnbhffjgnmr18b13g24xxnqy5kww0"))
               (modules '((guix build utils)))
               (snippet
                ;; Don't duplicate test names.
@@ -1969,7 +1967,7 @@ library.")
 (define-public glib-networking
   (package
     (name "glib-networking")
-    (version "2.48.0")
+    (version "2.46.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/glib-networking/"
@@ -1977,7 +1975,7 @@ library.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "094hwgnaqm0c7ggyqc9rk2603k5r9vqs3f1d9vwpmfapww9367vs"))
+                "1cchmi08jpjypgmm9i7xzh5qfg2q5k61kry9ns8mhw3z44a440ym"))
               (patches
                (search-patches "glib-networking-ssl-cert-file.patch"))))
     (build-system gnu-build-system)
@@ -2051,7 +2049,7 @@ libxml to ease remote use of the RESTful API.")
 (define-public libsoup
   (package
     (name "libsoup")
-    (version "2.54.0.1")
+    (version "2.52.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/libsoup/"
@@ -2059,7 +2057,7 @@ libxml to ease remote use of the RESTful API.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1q1qds87qya5cbx4jfcmf1v8fvb86p0wsjnhj246w0xxcq0r5r5d"))))
+                "0j6cnnpqqgnb9nj2r0j8j6898np4z503hrnpis7b4l5d8yhbq68f"))))
     (build-system gnu-build-system)
     (outputs '("out" "doc"))
     (arguments
@@ -2121,7 +2119,7 @@ and the GLib main loop, to integrate well with GNOME applications.")
 (define-public libsecret
   (package
     (name "libsecret")
-    (version "0.18.5")
+    (version "0.18.3")
     (source (origin
               (method url-fetch)
               (uri (string-append
@@ -2130,7 +2128,7 @@ and the GLib main loop, to integrate well with GNOME applications.")
                     name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1cychxc3ff8fp857iikw0n2s13s2mhw2dn1mr632f7w3sn6vvrww"))))
+                "1jc4pw6pb5igwasj0ms1zx80w63c11myziz3ydj0cr5lb861vgzj"))))
     (build-system gnu-build-system)
     (outputs '("out" "doc"))
     (arguments
@@ -2169,7 +2167,7 @@ and other secrets.  It communicates with the \"Secret Service\" using DBus.")
 (define-public gnome-mines
   (package
     (name "gnome-mines")
-    (version "3.20.0")
+    (version "3.18.2")
     (source
      (origin
        (method url-fetch)
@@ -2178,7 +2176,7 @@ and other secrets.  It communicates with the \"Secret Service\" using DBus.")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "19khp4ckqbdgk6828gprxy52fsg8klf957dnwsin75nskk8whxbp"))))
+         "0izkcf81rji4dj9k0k93ij4lp5iza2bh6jwlcdhbjfv2xdw0f7ky"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      '(#:phases
@@ -2186,7 +2184,16 @@ and other secrets.  It communicates with the \"Secret Service\" using DBus.")
          (add-before 'configure 'patch-/bin/true
                      (lambda _
                        (substitute* "configure"
-                         (("/bin/true") (which "true"))))))))
+                         (("/bin/true") (which "true")))))
+         (add-after 'install 'wrap-pixbuf
+                    ;; Use librsvg's loaders.cache to support SVG files.
+                    (lambda* (#:key inputs outputs #:allow-other-keys)
+                      (let* ((out    (assoc-ref outputs "out"))
+                             (prog   (string-append out "/bin/gnome-mines"))
+                             (rsvg   (assoc-ref inputs "librsvg"))
+                             (pixbuf (find-files rsvg "^loaders\\.cache$")))
+                        (wrap-program prog
+                          `("GDK_PIXBUF_MODULE_FILE" = ,pixbuf))))))))
     (native-inputs
      `(("pkg-config" ,pkg-config)
        ("desktop-file-utils" ,desktop-file-utils)
@@ -2241,7 +2248,7 @@ more fun.")
 (define-public gnome-terminal
   (package
     (name "gnome-terminal")
-    (version "3.20.0")
+    (version "3.18.2")
     (source
      (origin
        (method url-fetch)
@@ -2250,7 +2257,7 @@ more fun.")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "0l21xcc2g56wkq83wq5wnrah2gwckqxnfgpqavhkrsd47jyzdrrg"))))
+         "1ylyv0mla2ypms7iyxndbdjvha0q9jzglb4mhfmqn9cm2gxc0day"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      '(#:configure-flags
@@ -2400,7 +2407,7 @@ permission from user.")
 (define-public geocode-glib
   (package
     (name "geocode-glib")
-    (version "3.20.0")
+    (version "3.18.0")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/geocode-glib/"
@@ -2408,7 +2415,7 @@ permission from user.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1fmn3gmifq8jbgnpv8jj33n4glpb5djjrfk0l9fak0cliqin88jz"))))
+                "0pa9cgndycynipc6z8wzbvn2fi89ndf2gpqzm9m6krp3d7az1dwg"))))
     (build-system gnu-build-system)
     (arguments
      `(;; The tests want to write to $HOME/.cache/geocode-glib, which doesn't
@@ -2491,7 +2498,7 @@ service via the system message bus.")
 (define-public libgweather
   (package
     (name "libgweather")
-    (version "3.20.0")
+    (version "3.18.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -2499,7 +2506,7 @@ service via the system message bus.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1mmqg7wf0bhk450akyj0x71x75kh1v7j68isyivr75ydky79nqjj"))))
+                "1l3sra84k5dnavbdbjyf1ar84xmjszpnnldih6mf45kniwpjkcll"))))
     (build-system gnu-build-system)
     (arguments
      `(#:configure-flags
@@ -2541,7 +2548,7 @@ services for numerous locations.")
 (define-public gnome-settings-daemon
   (package
     (name "gnome-settings-daemon")
-    (version "3.20.0")
+    (version "3.18.2")
     (source
      (origin
        (method url-fetch)
@@ -2550,7 +2557,7 @@ services for numerous locations.")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "0v1c2vnpqw5pvx62jxvjfa2g5k29yx04vz35awqi943gasrl0bmv"))))
+         "0vzwf875csyqx04fnra6zicmzcjc3s13bxxpcizlys12iwjwfw9h"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      `(;; Network manager not yet packaged.
@@ -2597,14 +2604,14 @@ settings, themes, mouse settings, and startup of other daemons.")
 (define-public totem-pl-parser
  (package
    (name "totem-pl-parser")
-   (version "3.10.6")
+   (version "3.10.5")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/totem-pl-parser/3.10/"
                                 "totem-pl-parser-" version ".tar.xz"))
             (sha256
              (base32
-              "0mv7aw9mw77w04zg95zjf0zmk6ckshpysbb9nap15h5is6zdk9cq"))))
+              "0dw1kiwmjwdjrighri0j9nagsnj44dllm0mamnfh4y5nc47mhim7"))))
    (build-system gnu-build-system)
    (arguments
     ;; FIXME: Tests require gvfs.
@@ -2632,7 +2639,7 @@ playlists in a variety of formats.")
 (define-public aisleriot
   (package
     (name "aisleriot")
-    (version "3.20.1")
+    (version "3.18.2")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -2640,7 +2647,7 @@ playlists in a variety of formats.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1nipky336jj81mhm8wwxp96zilgcrarihf95dnyj3r1pw8kpg7gy"))))
+                "1qrgcj30hl0fgssspkwrad10lqy1bbsp7lfwxmxlwzp33jhqpb0b"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      '(#:configure-flags
@@ -2668,7 +2675,7 @@ which are easy to play with the aid of a mouse.")
 (define-public devhelp
   (package
     (name "devhelp")
-    (version "3.20.0")
+    (version "3.18.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -2676,7 +2683,7 @@ which are easy to play with the aid of a mouse.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "078zr92xs5ifp862v1vdmw1j9m6gr9zk5hjbk5065vxjwb17acx2"))))
+                "1vqsqpc51cir5qf801ibh6ljlpfw0qd513l9hjcnzp4ls8m1cfih"))))
     (build-system glib-or-gtk-build-system)
     (native-inputs
      `(("intltool" ,intltool)
@@ -2762,7 +2769,7 @@ without stepping on each others toes.")
 (define-public clutter
   (package
     (name "clutter")
-    (version "1.26.0")
+    (version "1.24.2")
     (source
      (origin
        (method url-fetch)
@@ -2771,7 +2778,7 @@ without stepping on each others toes.")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "01nfjd4k7j2n3agpx2d9ncff86nfsqv4n23465rb9zmk4iw4wlb7"))))
+         "0qyd0cw17wi8gl6y9z2j2lh2gwghxskfmsdvw4ayrgxwnj6cjccn"))))
     (build-system gnu-build-system)
     (outputs '("out"
                "doc"))                            ;9 MiB of gtk-doc HTML pages
@@ -2815,7 +2822,7 @@ presentations, kiosk style applications and so on.")
 (define-public clutter-gtk
   (package
     (name "clutter-gtk")
-    (version "1.8.0")
+    (version "1.6.6")
     (source
      (origin
        (method url-fetch)
@@ -2824,7 +2831,7 @@ presentations, kiosk style applications and so on.")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "07dzvx0b3fsswxnpxgk0adjgccnrvbxsd971naqwndnfivbgjbkl"))))
+         "0a2a8ci6in82l43zak3zj3cyms23i5rq6lzk1bz013gm023ach4l"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("pkg-config" ,pkg-config)
@@ -2844,7 +2851,7 @@ presentations, kiosk style applications and so on.")
 (define-public clutter-gst
   (package
     (name "clutter-gst")
-    (version "3.0.18")
+    (version "3.0.14")
     (source
      (origin
        (method url-fetch)
@@ -2853,7 +2860,7 @@ presentations, kiosk style applications and so on.")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "14w0pi9myvcn1yxzmk9sk8dghj17m5ji3aqdpfjikk90c060vv0a"))))
+         "1qidm0q28q6w8gjd0gpqnk8fzqxv39dcp0vlzzawlncp8zfagj7p"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("glib:bin" ,glib "bin")     ; for glib-mkenums
@@ -2875,7 +2882,7 @@ GL based interactive canvas library.")
 (define-public libchamplain
   (package
     (name "libchamplain")
-    (version "0.12.13")
+    (version "0.12.12")
     (source (origin
               (method url-fetch)
               (uri (string-append
@@ -2883,7 +2890,7 @@ GL based interactive canvas library.")
                     version ".tar.xz"))
               (sha256
                (base32
-                "1arzd1hsgq14rbiwa1ih2g250x6ljna2s2kiqfrw155c612s9cxk"))))
+                "19jlhbgfn9c9g40b3fa2x373s6rfcwx5i9lbpl3vl7d901r7kpp7"))))
     (build-system gnu-build-system)
     (native-inputs `(("pkg-config" ,pkg-config)))
     (propagated-inputs
@@ -2939,7 +2946,7 @@ queries upon that data.")
 (define-public gnome-klotski
   (package
     (name "gnome-klotski")
-    (version "3.20.0")
+    (version "3.18.2")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -2947,7 +2954,7 @@ queries upon that data.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "00hs3ci8swmq12rmgidy7rf3ql9isbklhn114v8rzdfs46y5dzkp"))))
+                "14l1fji0860yam41x2cy72nd9bljph385ynfm6k1lsv4qhv72az2"))))
     (build-system glib-or-gtk-build-system)
     (native-inputs
      `(("desktop-file-utils" ,desktop-file-utils)
@@ -2970,7 +2977,7 @@ as possible!")
 (define-public grilo
   (package
     (name "grilo")
-    (version "0.2.15")
+    (version "0.2.14")
     (source
      (origin
        (method url-fetch)
@@ -2979,7 +2986,7 @@ as possible!")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "05b8sqfmywg45b9frya6xmw5l3c8vf5a1nhy51nyfs0a4n1japbg"))))
+         "1k8wj8f7xfaw5hxypnmwd34li3fq8h76dacach547rvsfjhjxj3r"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("glib:bin" ,glib "bin")         ; for glib-mkenums and glib-genmarshal
@@ -3021,7 +3028,7 @@ for application developers.")
 (define-public grilo-plugins
   (package
     (name "grilo-plugins")
-    (version "0.2.17")
+    (version "0.2.16")
     (source
      (origin
        (method url-fetch)
@@ -3030,7 +3037,7 @@ for application developers.")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "109pf4sz320jiqs1nzszpj2flkwrgwfsm64kza24mxnxih4njxik"))))
+         "00sjmkzxc8w4qn4lp5yj65c4y83mwhp0zlvk11ghvpxnklgmgd40"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("glib:bin" ,glib "bin")     ; for glib-mkenums and glib-genmarshal
@@ -3073,7 +3080,7 @@ for application developers.")
 (define-public totem
   (package
     (name "totem")
-    (version "3.20.0")
+    (version "3.18.1")
     (source
      (origin
        (method url-fetch)
@@ -3082,7 +3089,7 @@ for application developers.")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "1pq3fg4778qrylkg6lc4jcb3gvm46n5y7mfn26iihi23aj844yq7"))))
+         "18h784c77m4h359j3xnlwqlfvnhbw7m052ahzm26r106jsp6x0fp"))))
     (build-system glib-or-gtk-build-system)
     (native-inputs
      `(("pkg-config" ,pkg-config)
@@ -3239,7 +3246,7 @@ supports playlists, song ratings, and any codecs installed through gstreamer.")
 (define-public eog
  (package
    (name "eog")
-   (version "3.20.0")
+   (version "3.18.1")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/" name "/"
@@ -3247,7 +3254,7 @@ supports playlists, song ratings, and any codecs installed through gstreamer.")
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "0avy7sss6rf659rxipvp3gbqw083liq627lxjpfp1ij34hbmqwfv"))))
+              "19wkawrcwjjcvlmizkj57qycnbgizhr8ck3j5qg70605d1xb8yvv"))))
    (build-system glib-or-gtk-build-system)
    (arguments
     `(#:phases
@@ -3317,7 +3324,7 @@ part of udev-extras, then udev, then systemd.  It's now a project on its own.")
 (define-public gvfs
   (package
     (name "gvfs")
-    (version "1.28.0")
+    (version "1.26.2")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -3325,7 +3332,7 @@ part of udev-extras, then udev, then systemd.  It's now a project on its own.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "017pynx7rfrhgvg904kwxdw9dc26zb0v7ymkspm059qcvw5gqwng"))))
+                "064dsjrdjcbi38zl38jhh4r9jcpiygg7x4c8s6s2rb757l7nwnv9"))))
     (build-system gnu-build-system)
     (arguments
      '(#:tests? #f)) ; XXX: requiring `pidof'
@@ -3469,7 +3476,7 @@ work and the interface is well tested.")
 (define-public epiphany
   (package
     (name "epiphany")
-    (version "3.20.0")
+    (version "3.18.2")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -3477,7 +3484,7 @@ work and the interface is well tested.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0x09dfc0zdxw93g1dcmxqpvy9vnv94bd27sfq23ix31z6i9fcs63"))))
+                "1hm6bpdcc6nf3zamzkvjhpvxnpaxzbnxnacfgl5v8swn643ifdl4"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      ;; FIXME: tests run under Xvfb, but fail with:
@@ -3575,7 +3582,7 @@ of running programs and invoke methods on those interfaces.")
 (define-public yelp-xsl
   (package
     (name "yelp-xsl")
-    (version "3.20.0")
+    (version "3.18.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -3583,7 +3590,7 @@ of running programs and invoke methods on those interfaces.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0j288fw7bqbswl2vk73ihs0ngky0b3p8k1yy5lrxfh1whn3phclz"))))
+                "0qmsq7qkc06gmnkvbs84qj3jjzlihriy3z45nfbpgg51b6z0z1q0"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("intltool" ,intltool)
@@ -3599,7 +3606,7 @@ to format Docbook and Mallard documents.")
 (define-public yelp
   (package
     (name "yelp")
-    (version "3.20.0")
+    (version "3.18.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -3607,7 +3614,7 @@ to format Docbook and Mallard documents.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0g404njlgr38nif9hb3krybavk56wplkafxvfibcg68iqp9465dz"))))
+                "10384lr712xdr8zbi07vqh0cf4nd7ybg1vs05r5cy3kwf6s4wfms"))))
     (build-system glib-or-gtk-build-system)
     (native-inputs
      `(("glib:bin" ,glib "bin") ; for glib-genmarshal, etc.
@@ -3785,7 +3792,7 @@ share them with others via social networking and more.")
 (define-public file-roller
   (package
     (name "file-roller")
-    (version "3.20.0")
+    (version "3.16.4")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -3793,7 +3800,7 @@ share them with others via social networking and more.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1a5598zyzdhdyk7sq59h8hqrjlacxw6wfdmgi0cs5kvbzjr9jnhq"))))
+                "11a1g8f2700n2mz998wf40dz1rxjgap60mfns9iv0zlw5h5rhmal"))))
     (build-system glib-or-gtk-build-system)
     (native-inputs
      `(("intltool" ,intltool)
@@ -3818,7 +3825,7 @@ such as gzip tarballs.")
 (define-public gnome-session
   (package
     (name "gnome-session")
-    (version "3.20.0")
+    (version "3.18.1.2")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -3826,7 +3833,7 @@ such as gzip tarballs.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0d0v60lmvr8wbrswfpc4f4jg2dhxj6nkgv7wnwdf2zifk8vp5zv6"))))
+                "0icajbzqf5llvp5s8nafwkhwz6a6jmwn4hhs81bk0bpzawyq4zdk"))))
     (arguments
      '(#:phases
        (modify-phases %standard-phases
@@ -3942,7 +3949,7 @@ javascript engine and the GObject introspection framework.")
 (define-public gedit
   (package
     (name "gedit")
-    (version "3.20.1")
+    (version "3.18.3")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -3950,7 +3957,7 @@ javascript engine and the GObject introspection framework.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1i0x1jd9x1vpv8lwdlzwf0ml8jxh3b3l6nlg6pbnfjw47w3y6iws"))))
+                "1rrjdkvwwjyj05jc9icifjm9v8sgs0wqgy555m57a3rvg46sqqk7"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      `(#:phases
@@ -3999,7 +4006,7 @@ powerful general purpose text editor.")
 (define-public zenity
   (package
     (name "zenity")
-    (version "3.20.0")
+    (version "3.18.1.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4007,7 +4014,7 @@ powerful general purpose text editor.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0j2sy6imwp41l75hy3fwr68n35drvanbwgmr42kc04zqjy9pbs02"))))
+                "02m88dfm1rziqk2ywakwib06wl1rxangbzih6cp8wllbyl1plcg6"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("gettext" ,gnu-gettext)
@@ -4026,7 +4033,7 @@ to display dialog boxes from the commandline and shell scripts.")
 (define-public mutter
   (package
     (name "mutter")
-    (version "3.20.0")
+    (version "3.18.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4034,7 +4041,7 @@ to display dialog boxes from the commandline and shell scripts.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1x8nhnili1bq3pnrvr3jsgchcz36jzi9infrbr3gplwxnsbx4i2n"))))
+                "1ab959z5fgi4rq0ifxdqvpdbv99a2b1lfgvj327s9crdvk4ygpjg"))))
     (build-system gnu-build-system)
     (arguments
      '(#:configure-flags
@@ -4076,7 +4083,7 @@ window manager.")
 (define-public gnome-online-accounts
   (package
     (name "gnome-online-accounts")
-    (version "3.20.0")
+    (version "3.18.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4084,7 +4091,7 @@ window manager.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0q546q65ba537dbxqnvs27x6pvhvi394v43kihgw4pa59j8k70n9"))))
+                "1hn2fvkr1f4qh4gix03avnvk7pklvv5272ns8ws56v4kcq4nppkc"))))
     (build-system glib-or-gtk-build-system)
     (native-inputs
      `(("glib:bin" ,glib "bin") ; for glib-compile-schemas, etc.
@@ -4114,7 +4121,7 @@ Exchange, Last.fm, IMAP/SMTP, Jabber, SIP and Kerberos.")
 (define-public evolution-data-server
   (package
     (name "evolution-data-server")
-    (version "3.20.0")
+    (version "3.18.2")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4122,7 +4129,7 @@ Exchange, Last.fm, IMAP/SMTP, Jabber, SIP and Kerberos.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0jsgzahaha6bxrm15da7c32m8ksnmx9rfm7xdx99lbxhsm7yiwh5"))))
+                "16yfd2a00xqxikyf6pi2awfd0qfq4hwdhfar88axrb4mycfgqhjr"))))
     (build-system gnu-build-system)
     (arguments
      '(;; XXX: fails with:
@@ -4175,7 +4182,7 @@ Evolution (hence the name), but is now used by other packages as well.")
 (define-public caribou
   (package
     (name "caribou")
-    (version "0.4.20")
+    (version "0.4.19")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4183,7 +4190,7 @@ Evolution (hence the name), but is now used by other packages as well.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1nahpfs5ap9f9wsvn93kg8isqffk60v785f1q6k64awcd7an8ris"))))
+                "0i2s2xy9ami3wslam15cajhggpcsj4c70qm7qddcz52z9k0x02rg"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      '(#:phases
@@ -4394,7 +4401,7 @@ libxml2.")
 (define-public gdm
   (package
     (name "gdm")
-    (version "3.20.0")
+    (version "3.18.2")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4402,7 +4409,7 @@ libxml2.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1hnkv4j4m6z9l2y1rzxn674ir34k57apz1ybr15m11ksn05vlky6"))))
+                "08pqhslwd487nh9w0jp4d0s4s2imm4ds0jjsbl6lzmqifqj3b4jl"))))
     (build-system gnu-build-system)
     (arguments
      '(#:configure-flags
@@ -4454,7 +4461,7 @@ providing graphical log-ins and managing local and remote displays.")
 (define-public libgtop
   (package
     (name "libgtop")
-    (version "2.34.0")
+    (version "2.32.0")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4462,7 +4469,7 @@ providing graphical log-ins and managing local and remote displays.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "0apfnh9k6vmbdm8ms5wxyhagrrl8r88fv48k7q5qq70df2gf72ld"))))
+                "13hpml2vfm23816qggr5fvxj75ndb1dq4rgmi7ik6azj69ij8hw4"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("gobject-introspection" ,gobject-introspection)
@@ -4481,7 +4488,7 @@ usage and information about running processes.")
 (define-public gnome-bluetooth
   (package
     (name "gnome-bluetooth")
-    (version "3.18.3")
+    (version "3.18.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4489,7 +4496,7 @@ usage and information about running processes.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1qwc9q7x22sc71zhqv4db78rqzxl6fqfw6d978ydqap54c2bg0g4"))))
+                "0jaa9nbygdvcqp9k4p4iy2g8x3684s4x9k5nbcmmm11jdn4mn7f5"))))
     (build-system glib-or-gtk-build-system)
     (native-inputs
      `(("glib:bin" ,glib "bin") ; for gdbus-codegen, etc.
@@ -4514,7 +4521,7 @@ devices using the GNOME desktop.")
 (define-public gnome-control-center
   (package
     (name "gnome-control-center")
-    (version "3.20.0")
+    (version "3.18.2")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4522,7 +4529,7 @@ devices using the GNOME desktop.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "10yncjq5hmaqbr8kjf8s729kn11as705vfx32nxahi7229v31rxp"))))
+                "1bgqg1sl3cp2azrwrjgwx3jzk9n3w76xpcyvk257qavx4ibn3zin"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      '(#:phases
@@ -4584,7 +4591,7 @@ properties, screen resolution, and other GNOME parameters.")
 (define-public gnome-shell
   (package
     (name "gnome-shell")
-    (version "3.20.0")
+    (version "3.18.3")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4592,7 +4599,7 @@ properties, screen resolution, and other GNOME parameters.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "125qjrbw40r8rpri9y0yrl5yqs2q4x0l5inzi3vwl0rxvmhz8sgf"))))
+                "16sicxdp08yfaj4hiyzvbspb5jk3fpmi291272zhx5vgc3wbl5w5"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      '(#:phases
@@ -4704,7 +4711,7 @@ as SASL, TLS and VeNCrypt.  Additionally it supports encoding extensions.")
 (define-public nautilus
   (package
     (name "nautilus")
-    (version "3.20.0")
+    (version "3.18.2") ; XXX: later version require gtk+-3.0 >= 3.18.5
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -4712,11 +4719,10 @@ as SASL, TLS and VeNCrypt.  Additionally it supports encoding extensions.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "14s234b4l7hsxng1n3kkj4c8sjsq2vl2l2fw0caqfxva9md9k9vw"))))
+                "0jj23n8vmmyc4gp5xhiz7slsxwksydp26blxi5m154yaw9lgdp38"))))
     (build-system glib-or-gtk-build-system)
     (arguments
-     '(#:configure-flags
-       '("--disable-tracker" "--disable-selinux") ; XXX: not packaged
+     '(#:configure-flags '("--disable-tracker") ; XXX: not packaged
        ;; XXX: FAIL: check-nautilus
        ;;   Settings schema 'org.gnome.nautilus.preferences' is not installed
        #:tests? #f))
@@ -4749,7 +4755,7 @@ files.")
 (define-public baobab
   (package
     (name "baobab")
-    (version "3.20.0")
+    (version "3.18.1")
     (source (origin
               (method url-fetch)
               (uri (string-append
@@ -4758,7 +4764,7 @@ files.")
                     name "-" version ".tar.xz"))
               (sha256
                (base32
-                "01vxc9z87i2dsvydm6p1sh4m7bpbggy70q9bx6pxz707hyr6bpaw"))))
+                "1da4bdkw5bnxansl1xr4lb03d6f4h0a0qaba8i3p3rwhcd191b62"))))
     (build-system glib-or-gtk-build-system)
     (native-inputs
      `(("intltool" ,intltool)
@@ -4781,7 +4787,7 @@ is complete it provides a graphical representation of each selected folder.")
 (define-public gnome-backgrounds
   (package
     (name "gnome-backgrounds")
-    (version "3.20")
+    (version "3.18.0")
     (source
      (origin
        (method url-fetch)
@@ -4790,7 +4796,7 @@ is complete it provides a graphical representation of each selected folder.")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "09viag7q53lfwrp074a1w7j0r8izlwpi10xbwjgbf5jwbqb6wv6n"))))
+         "1fd7y8dh3iy88ayb8irgsihvssli6bzjzb5a6vfhi8qjbw70ymma"))))
     (build-system glib-or-gtk-build-system)
     (native-inputs
      `(("intltool" ,intltool)))
@@ -4840,7 +4846,7 @@ beautifying border effects.")
 (define-public dconf-editor
   (package
     (name "dconf-editor")
-    (version "3.20.0")
+    (version "3.18.2")
     (source
      (origin
        (method url-fetch)
@@ -4849,7 +4855,7 @@ beautifying border effects.")
                            name "-" version ".tar.xz"))
        (sha256
         (base32
-         "0q57wmlab01rmwbwlih5mh9fa1nwc2abfz0vl374lkljw9acim13"))))
+         "0xdwi7g1xdmgrc9m8ii62fp2zj114gsfpmgazlnhrcmmfi97z5d7"))))
     (build-system glib-or-gtk-build-system)
     (native-inputs
      `(("glib:bin" ,glib "bin") ; for glib-compile-schemas, gio-2.0.
diff --git a/gnu/packages/gtk.scm b/gnu/packages/gtk.scm
index f31a510504..255d885b27 100644
--- a/gnu/packages/gtk.scm
+++ b/gnu/packages/gtk.scm
@@ -63,7 +63,7 @@
 (define-public atk
   (package
    (name "atk")
-   (version "2.20.0")
+   (version "2.18.0")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/" name "/"
@@ -71,7 +71,7 @@
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "1w1q29yfxcq67j7fyqrfm0l0n1vy4zn539c0sf4ga9d0qkv50fj9"))))
+              "0ay9s137x49f0akx658p7kznz0rdapfrd8ym54q0hlgrggblhv6f"))))
    (build-system gnu-build-system)
    (outputs '("out" "doc"))
    (arguments
@@ -95,14 +95,14 @@ tools have full access to view and control running applications.")
 (define-public cairo
   (package
    (name "cairo")
-   (version "1.14.6")
+   (version "1.14.2")
    (source (origin
             (method url-fetch)
             (uri (string-append "http://cairographics.org/releases/cairo-"
                                 version ".tar.xz"))
             (sha256
              (base32
-              "0lmjlzmghmr27y615px9hkm552x7ap6pmq9mfbzr6smp8y2b6g31"))))
+              "1sycbq0agbwmg1bj9lhkgsf0glmblaf2jrdy9g6vxfxivncxj6f9"))))
    (build-system gnu-build-system)
    (propagated-inputs
     `(("fontconfig" ,fontconfig)
@@ -147,7 +147,7 @@ affine transformation (scale, rotation, shear, etc.).")
 (define-public harfbuzz
   (package
    (name "harfbuzz")
-   (version "1.2.4")
+   (version "1.0.6")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://www.freedesktop.org/software/"
@@ -155,7 +155,7 @@ affine transformation (scale, rotation, shear, etc.).")
                                  version ".tar.bz2"))
              (sha256
               (base32
-               "14g4kpph8hgplkm954daxiymxx0vicfq7b7svvdsx54g5bqvv7a4"))))
+               "09ivk5m4y09ar4zi9r6db7gp234cy05h0ach7w22g9kqvkxsf5pn"))))
    (build-system gnu-build-system)
    (outputs '("out"
               "bin")) ; 160K, only hb-view depend on cairo
@@ -185,7 +185,7 @@ affine transformation (scale, rotation, shear, etc.).")
 (define-public pango
   (package
    (name "pango")
-   (version "1.40.0")
+   (version "1.38.1")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/pango/"
@@ -193,7 +193,7 @@ affine transformation (scale, rotation, shear, etc.).")
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "12qwa748wyady16xxdq5rqz9gki1kksj8m5bcv80gjqlydfrh5ys"))))
+              "1dsf45m51i4rcyvh5wlxxrjfhvn5b67d5ckjc6vdcxbddjgmc80k"))))
    (build-system gnu-build-system)
    (propagated-inputs
     `(("cairo" ,cairo)
@@ -339,7 +339,7 @@ printing and other features typical of a source code editor.")
 (define-public gtksourceview
  (package
    (name "gtksourceview")
-   (version "3.20.1")
+   (version "3.18.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnome/sources/" name "/"
@@ -347,7 +347,7 @@ printing and other features typical of a source code editor.")
                                  name "-" version ".tar.xz"))
              (sha256
               (base32
-               "0k4cmq94181l39di9z4agampg4za6bvimkvcjm3qlxmsxb09ab9j"))))
+               "1cmplnqbyd1js5bkpi9cfc3gljilyxg5nngwh4i3mq9r02gmmxv0"))))
    (build-system gnu-build-system)
    (arguments
     '(#:phases
@@ -387,7 +387,7 @@ highlighting and other features typical of a source code editor.")
 (define-public gdk-pixbuf
   (package
    (name "gdk-pixbuf")
-   (version "2.34.0")
+   (version "2.32.3")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/" name "/"
@@ -395,7 +395,7 @@ highlighting and other features typical of a source code editor.")
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "0yc8indbl3hf18z6x6kjg59xp9sngm1d8vmz4c7bs6g27qw5npnm"))))
+              "0cfh87aqyqbfcwpbv1ihgmgfcn66il5q2n8yjyl8gxkjmkqp2rrb"))))
    (build-system gnu-build-system)
    (arguments
     '(#:configure-flags '("--with-x11")
@@ -415,12 +415,9 @@ highlighting and other features typical of a source code editor.")
              ;; (gdk-pixbuf-error-quark, 0)
              (("pixbuf-jpeg\\$\\(EXEEXT\\) ") ""))
            #t)))))
-   (propagated-inputs
-    `(;; Required by gdk-pixbuf-2.0.pc
-      ("glib" ,glib)
-      ("libpng" ,libpng)
-      ;; Used for testing and required at runtime.
-      ("shared-mime-info" ,shared-mime-info)))
+   (propagated-inputs ; required by gdk-pixbuf-2.0.pc
+    `(("glib" ,glib)
+      ("libpng" ,libpng)))
    (inputs
     `(("libjpeg" ,libjpeg)
       ("libtiff" ,libtiff)
@@ -468,7 +465,7 @@ in the GNOME project.")
 (define-public at-spi2-core
   (package
    (name "at-spi2-core")
-   (version "2.20.0")
+   (version "2.18.1")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/" name "/"
@@ -476,7 +473,7 @@ in the GNOME project.")
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "16v09iwnd3895fshsvsci836dar21c8y9w8zn882jn4fq2vrzi6w"))))
+              "1kq17w4fm51d49vzmglkxqdm6s0yvjvrpgw78r2hajf69jz5bmap"))))
    (build-system gnu-build-system)
    (outputs '("out" "doc"))
    (arguments
@@ -513,7 +510,7 @@ is part of the GNOME accessibility project.")
 (define-public at-spi2-atk
   (package
    (name "at-spi2-atk")
-   (version "2.20.0")
+   (version "2.18.1")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/" name "/"
@@ -521,7 +518,7 @@ is part of the GNOME accessibility project.")
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "1lis9zj4r3d5ff3chs0r93gjkbp0wgflfx35gbax47cgdqmi8jx2"))))
+              "0bf1g5cj84rmx7p1q547vwbc0hlpcs2wrxnmv96lckfkhs9mzcf4"))))
    (build-system gnu-build-system)
    (arguments
     '(#:phases
@@ -548,7 +545,7 @@ is part of the GNOME accessibility project.")
 (define-public gtk+-2
   (package
    (name "gtk+")
-   (version "2.24.30")
+   (version "2.24.28")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/" name "/"
@@ -556,14 +553,13 @@ is part of the GNOME accessibility project.")
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "0l6aqk86aw5w132ygy6hv6nlxvd1h6xg7c85qbm60p6mnv1ww58d"))
-            (patches (search-patches "gtk2-respect-GUIX_GTK2_PATH.patch"
-                                     "gtk2-theme-paths.patch"))))
+              "0mj6xn40py9r9lvzg633fal81xfwfm89d9mvz7jk4lmwk0g49imj"))
+            (patches (search-patches "gtk2-respect-GUIX_GTK2_PATH.patch"))))
    (build-system gnu-build-system)
    (outputs '("out" "doc"))
    (propagated-inputs
     `(("atk" ,atk)
-      ("gdk-pixbuf" ,gdk-pixbuf+svg)
+      ("gdk-pixbuf" ,gdk-pixbuf)
       ("pango" ,pango)))
    (inputs
     `(("cups" ,cups)
@@ -610,7 +606,7 @@ application suites.")
 (define-public gtk+
   (package (inherit gtk+-2)
    (name "gtk+")
-   (version "3.20.2")
+   (version "3.18.2")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/" name "/"
@@ -618,12 +614,12 @@ application suites.")
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "1xv97zrngf47hyrxz7rfrdl5xpv4y61rkmipyi300pm5iq3d3c8s"))
+              "0lp1hn0qydxx03bianzzr0a4maqzsvylrkzr7c3p0050qihwbgjx"))
             (patches (search-patches "gtk3-respect-GUIX_GTK3_PATH.patch"))))
    (propagated-inputs
     `(("at-spi2-atk" ,at-spi2-atk)
       ("atk" ,atk)
-      ("gdk-pixbuf" ,gdk-pixbuf+svg)
+      ("gdk-pixbuf" ,gdk-pixbuf)
       ("libepoxy" ,libepoxy)
       ("libxcursor" ,libxcursor)
       ("libxi" ,libxi)
@@ -631,7 +627,8 @@ application suites.")
       ("libxdamage" ,libxdamage)
       ("pango" ,pango)))
    (inputs
-    `(("libxml2" ,libxml2)
+    `(("librsvg" ,librsvg)                        ;for gtk-encode-symbolic-svg
+      ("libxml2" ,libxml2)
       ;; XXX: colord depends on mozjs (through polkit), which fails on
       ;;      on non-intel systems now.
       ;;("colord" ,colord)
@@ -666,7 +663,18 @@ application suites.")
            (("SUBDIRS = gdk gtk a11y css reftests")
             "SUBDIRS = gdk"))
          #t)
-       %standard-phases)))
+       (alist-cons-after
+        'install 'wrap-gtk-encode-symbolic-svg
+        ;; By using GdkPixbuf, gtk-encode-symbolic-svg needs to know
+        ;; librsvg's loaders.cache to handle SVG files.
+        (lambda* (#:key inputs outputs #:allow-other-keys)
+          (let* ((out (assoc-ref outputs "out"))
+                 (prog (string-append out "/bin/gtk-encode-symbolic-svg"))
+                 (librsvg (assoc-ref inputs "librsvg"))
+                 (loaders.cache (find-files librsvg "^loaders\\.cache$")))
+            (wrap-program prog
+              `("GDK_PIXBUF_MODULE_FILE" = ,loaders.cache))))
+        %standard-phases))))
    (native-search-paths
     (list (search-path-specification
            (variable "GUIX_GTK3_PATH")
@@ -856,7 +864,7 @@ library.")
 (define-public pangomm
   (package
     (name "pangomm")
-    (version "2.40.0")
+    (version "2.38.1")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnome/sources/" name "/"
@@ -864,7 +872,7 @@ library.")
                                  name "-" version ".tar.xz"))
              (sha256
               (base32
-               "03fpqdjp7plybf4zsgszbm8yhgl28vmajzfpmaqcsmyfvjlszl3x"))))
+               "12xwjvqfxhqblcv7641k0l6r8n3qifnrx8w9571izn1nbd81iyzg"))))
     (build-system gnu-build-system)
     (native-inputs `(("pkg-config" ,pkg-config)))
     (propagated-inputs
@@ -905,7 +913,7 @@ toolkit.")
 (define-public gtkmm
   (package
     (name "gtkmm")
-    (version "3.20.0")
+    (version "3.18.0")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnome/sources/" name "/"
@@ -913,7 +921,7 @@ toolkit.")
                                  name "-" version ".tar.xz"))
              (sha256
               (base32
-               "12h2kd22iayvjfhmgjccm33igrbvqdj7hym31fsa1y0dhwzmf8gh"))))
+               "0sxq700invkjpksn790gbnl8px8751kvgwn39663jx7dv89s37w2"))))
     (build-system gnu-build-system)
     (native-inputs `(("pkg-config" ,pkg-config)
                      ("glib" ,glib "bin")))      ;for 'glib-compile-resources'
diff --git a/gnu/packages/patches/glib-tests-desktop.patch b/gnu/packages/patches/glib-tests-desktop.patch
new file mode 100644
index 0000000000..642234ebbc
--- /dev/null
+++ b/gnu/packages/patches/glib-tests-desktop.patch
@@ -0,0 +1,138 @@
+Some GLib tests expect desktop things, such as an xterm, a MIME
+database, the `update-desktop-database' program, which we don't provide.
+
+--- glib-2.37.1/gio/tests/appinfo.c	2013-06-07 23:44:44.000000000 +0200
++++ glib-2.37.1/gio/tests/appinfo.c	2013-06-07 23:44:56.000000000 +0200
+@@ -497,16 +497,10 @@ main (int argc, char *argv[])
+ 
+   g_test_add_func ("/appinfo/basic", test_basic);
+   g_test_add_func ("/appinfo/text", test_text);
+-  g_test_add_func ("/appinfo/launch", test_launch);
+   g_test_add_func ("/appinfo/show-in", test_show_in);
+   g_test_add_func ("/appinfo/commandline", test_commandline);
+-  g_test_add_func ("/appinfo/launch-context", test_launch_context);
+-  g_test_add_func ("/appinfo/launch-context-signals", test_launch_context_signals);
+   g_test_add_func ("/appinfo/tryexec", test_tryexec);
+-  g_test_add_func ("/appinfo/associations", test_associations);
+   g_test_add_func ("/appinfo/environment", test_environment);
+-  g_test_add_func ("/appinfo/startup-wm-class", test_startup_wm_class);
+-  g_test_add_func ("/appinfo/supported-types", test_supported_types);
+   g_test_add_func ("/appinfo/from-keyfile", test_from_keyfile);
+ 
+   return g_test_run ();
+
+--- glib-2.40.0/gio/tests/contenttype.c	2013-01-16 21:22:29.000000000 +0100
++++ glib-2.40.0/gio/tests/contenttype.c	2013-01-16 21:22:33.000000000 +0100
+@@ -207,15 +207,6 @@ main (int argc, char *argv[])
+ {
+   g_test_init (&argc, &argv, NULL);
+ 
+-  g_test_add_func ("/contenttype/guess", test_guess);
+-  g_test_add_func ("/contenttype/unknown", test_unknown);
+-  g_test_add_func ("/contenttype/subtype", test_subtype);
+-  g_test_add_func ("/contenttype/list", test_list);
+-  g_test_add_func ("/contenttype/executable", test_executable);
+-  g_test_add_func ("/contenttype/description", test_description);
+-  g_test_add_func ("/contenttype/icon", test_icon);
+-  g_test_add_func ("/contenttype/symbolic-icon", test_symbolic_icon);
+-  g_test_add_func ("/contenttype/tree", test_tree);
+ 
+   return g_test_run ();
+ }
+
+
+--- glib-2.40.0/gio/tests/desktop-app-info.c	2014-03-19 22:50:45.000000000 -0500
++++ glib-2.40.0/gio/tests/desktop-app-info.c	2014-06-30 14:27:52.543358331 -0500
+@@ -708,6 +708,8 @@
+   g_setenv ("XDG_DATA_HOME", basedir, TRUE);
+   cleanup_subdirs (basedir);
+ 
++  result = g_test_run ();
++  return result;
+   g_test_add_func ("/desktop-app-info/delete", test_delete);
+   g_test_add_func ("/desktop-app-info/default", test_default);
+   g_test_add_func ("/desktop-app-info/fallback", test_fallback);
+
+
+-----------------------------
+The hunk below removes tests that depend on `gdbus-testserver.py',
+because that script depends on python-gobject.  The second hunk
+disables a test that expects /etc/machine-id in the build environment.
+ 
+--- glib-2.46.0/gio/tests/Makefile.in	2015-10-14 14:11:00.928809504 +0200
++++ glib-2.46.0/gio/tests/Makefile.in	2015-10-14 14:12:13.157291092 +0200
+@@ -186,20 +186,13 @@ check_PROGRAMS = $(am__EXEEXT_16)
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-auth				\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-bz627724				\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-close-pending			\
+-@HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-connection			\
+-@HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-connection-loss			\
+-@HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-connection-slow			\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-error				\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-exit-on-close			\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-export				\
+-@HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-introspection			\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-names				\
+-@HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-proxy				\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-proxy-threads			\
+-@HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-proxy-well-known-name		\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-test-codegen			\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-test-codegen-old			\
+-@HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gdbus-threading				\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gmenumodel				\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	gnotification				\
+ @HAVE_DBUS_DAEMON_TRUE@@OS_UNIX_TRUE@	$(NULL)
+@@ -321,8 +314,7 @@ libresourceplugin_la_LINK = $(LIBTOOL) $
+ am__EXEEXT_1 =
+ @OS_UNIX_TRUE@am__EXEEXT_2 = contenttype$(EXEEXT) file$(EXEEXT) \
+ @OS_UNIX_TRUE@	gdbus-peer-object-manager$(EXEEXT) \
+-@OS_UNIX_TRUE@	gdbus-unix-addresses$(EXEEXT) \
+ @OS_UNIX_TRUE@	live-g-file$(EXEEXT) socket-address$(EXEEXT) \
+ @OS_UNIX_TRUE@	stream-rw_all$(EXEEXT) unix-fd$(EXEEXT) \
+ @OS_UNIX_TRUE@	unix-streams$(EXEEXT) $(am__EXEEXT_1) \
+  
+
+The test below depends on the availability /etc/passwd to dbus-daemon.
+
+--- glib-2.40.0/gio/tests/gdbus-auth.c	2014-02-03 11:40:41.000000000 -0600
++++ glib-2.40.0/gio/tests/gdbus-auth.c	2014-06-30 15:08:43.719421893 -0500
+@@ -286,6 +286,8 @@
+ {
+   gint ret;
+ 
++  g_test_init (&argc, &argv, NULL);
++  return g_test_run();
+   setlocale (LC_ALL, "C");
+ 
+   temp_dbus_keyrings_setup ();
+
+
+The test dbus-appinfo is dropped as it hangs indefinitely since 2.37.5, see
+   https://launchpad.net/ubuntu/+source/glib2.0/2.37.5-1ubuntu1
+
+--- glib-2.40.0/gio/tests/dbus-appinfo.c	2014-02-03 11:40:41.000000000 -0600
++++ glib-2.40.0/gio/tests/dbus-appinfo.c	2014-06-30 14:44:08.215383632 -0500
+@@ -278,7 +278,7 @@
+ {
+   g_test_init (&argc, &argv, NULL);
+ 
+-  g_test_add_func ("/appinfo/dbusappinfo", test_dbus_appinfo);
++  return g_test_run();
+ 
+   return session_bus_run ();
+ }
+
+
+The test below fails for unknown reasons (!).
+
+--- glib-2.39.1/gio/tests/gsettings.c.orig	2014-01-20 00:45:04.000000000 +0100
++++ glib-2.39.1/gio/tests/gsettings.c	2014-01-20 00:45:10.000000000 +0100
+@@ -2489,7 +2489,6 @@ main (int argc, char *argv[])
+   g_test_add_func ("/gsettings/range/subprocess/high", test_range_high);
+   g_test_add_func ("/gsettings/range/subprocess/low", test_range_low);
+   g_test_add_func ("/gsettings/list-items", test_list_items);
+-  g_test_add_func ("/gsettings/list-schemas", test_list_schemas);
+   g_test_add_func ("/gsettings/mapped", test_get_mapped);
+   g_test_add_func ("/gsettings/get-range", test_get_range);
+   g_test_add_func ("/gsettings/schema-source", test_schema_source);
+
diff --git a/gnu/packages/patches/glib-tests-gapplication.patch b/gnu/packages/patches/glib-tests-gapplication.patch
new file mode 100644
index 0000000000..1845fcb9b8
--- /dev/null
+++ b/gnu/packages/patches/glib-tests-gapplication.patch
@@ -0,0 +1,28 @@
+This test has proven to be unreliable, often leading to things like this
+in gapplication.log:
+
+  PASS: gapplication 3 /gapplication/properties
+  Failed to register: The connection is closed
+  **
+  GLib-GIO:ERROR:gapplication.c:564:test_quit: assertion failed: (activated)
+  ok 4 /gapplication/app-id
+  PASS: gapplication 4 /gapplication/app-id
+  ../../tap-test: line 5: 24133 Aborted                 $1 -k --tap
+  # GLib-GIO:ERROR:gapplication.c:564:test_quit: assertion failed: (activated)
+  cleaning up pid 24154
+  ERROR: gapplication - missing test plan
+  ERROR: gapplication - exited with status 134 (terminated by signal 6?)
+
+See <https://bugs.debian.org/756273> and <http://bugs.gnu.org/18445>.
+
+
+--- glib-2.40.2/gio/tests/gapplication.c	2014-12-03 22:34:44.566667649 +0100
++++ glib-2.40.2/gio/tests/gapplication.c	2014-12-03 22:34:45.346674179 +0100
+@@ -685,7 +685,6 @@ main (int argc, char **argv)
+ /*  g_test_add_func ("/gapplication/non-unique", test_nonunique); */
+   g_test_add_func ("/gapplication/properties", properties);
+   g_test_add_func ("/gapplication/app-id", appid);
+-  g_test_add_func ("/gapplication/quit", test_quit);
+   g_test_add_func ("/gapplication/local-actions", test_local_actions);
+ /*  g_test_add_func ("/gapplication/remote-actions", test_remote_actions); */
+   g_test_add_func ("/gapplication/local-command-line", test_local_command_line);
diff --git a/gnu/packages/patches/glib-tests-homedir.patch b/gnu/packages/patches/glib-tests-homedir.patch
new file mode 100644
index 0000000000..0a2bcf1a23
--- /dev/null
+++ b/gnu/packages/patches/glib-tests-homedir.patch
@@ -0,0 +1,59 @@
+`g_get_home_dir' looks at /etc/passwd first, which fails in chroot builds.
+The gdbus tests use it to lookup .dbus-keyrings, so they cannot run in our
+chroot build environment.  Thus, disable them.
+
+--- glib-2.34.3/gio/tests/gdbus-connection-flush.c	2013-01-16 17:29:46.000000000 +0100
++++ glib-2.34.3/gio/tests/gdbus-connection-flush.c	2013-01-16 17:29:47.000000000 +0100
+@@ -373,10 +373,6 @@ main (int   argc,
+   g_type_init ();
+   g_test_init (&argc, &argv, NULL);
+ 
+-  g_test_add ("/gdbus/connection/flush/busy", Fixture, NULL,
+-              setup, test_flush_busy, teardown);
+-  g_test_add ("/gdbus/connection/flush/idle", Fixture, NULL,
+-              setup, test_flush_idle, teardown);
+ 
+   ret = g_test_run();
+
+--- glib-2.38.0.orig/gio/tests/gdbus-peer.c     2013-08-08 12:00:40.000000000 +0200
++++ glib-2.38.0/gio/tests/gdbus-peer.c  2013-09-30 19:36:40.000000000 +0200
+@@ -1746,11 +1746,6 @@
+
+   g_test_add_func ("/gdbus/peer-to-peer", test_peer);
+   g_test_add_func ("/gdbus/delayed-message-processing", delayed_message_processing);
+-  g_test_add_func ("/gdbus/nonce-tcp", test_nonce_tcp);
+-
+-  g_test_add_func ("/gdbus/tcp-anonymous", test_tcp_anonymous);
+-  g_test_add_func ("/gdbus/credentials", test_credentials);
+-  g_test_add_func ("/gdbus/codegen-peer-to-peer", codegen_test_peer);
+
+   ret = g_test_run();
+ 
+--- glib-2.37.1/gio/tests/gdbus-exit-on-close.c	2013-06-07 23:41:34.000000000 +0200
++++ glib-2.37.1/gio/tests/gdbus-exit-on-close.c	2013-06-07 23:41:40.000000000 +0200
+@@ -211,6 +211,7 @@ main (int   argc,
+ 
+   g_test_init (&argc, &argv, NULL);
+ 
++  return g_test_run();
+   for (i = 0; cases[i].name != NULL; i++)
+     {
+       gchar *name;
+@@ -224,5 +225,4 @@ main (int   argc,
+       g_free (name);
+     }
+ 
+-  return g_test_run();
+ }
+
+--- glib-2.34.3/gio/tests/gdbus-non-socket.c	2013-01-16 18:13:25.000000000 +0100
++++ glib-2.34.3/gio/tests/gdbus-non-socket.c	2013-01-16 18:13:27.000000000 +0100
+@@ -294,7 +294,6 @@ main (int   argc,
+   g_type_init ();
+   g_test_init (&argc, &argv, NULL);
+ 
+-  g_test_add_func ("/gdbus/non-socket", test_non_socket);
+ 
+   ret = g_test_run();
+ 
+
diff --git a/gnu/packages/patches/glib-tests-prlimit.patch b/gnu/packages/patches/glib-tests-prlimit.patch
new file mode 100644
index 0000000000..f2b2a61bee
--- /dev/null
+++ b/gnu/packages/patches/glib-tests-prlimit.patch
@@ -0,0 +1,14 @@
+prlimit(2) returns ENOSYS on Linux 2.6.32-5-xen-amd64 as found on
+hydra.gnu.org, and strace(1) doesn't recognize it.
+
+--- glib-2.34.3/glib/tests/thread.c	2012-11-20 15:27:12.000000000 +0100
++++ glib-2.34.3/glib/tests/thread.c	2013-03-27 14:48:31.000000000 +0100
+@@ -130,7 +130,7 @@ test_thread3 (void)
+ static void
+ test_thread4 (void)
+ {
+-#ifdef HAVE_PRLIMIT
++#if 0
+   struct rlimit ol, nl;
+   GThread *thread;
+   GError *error;
diff --git a/gnu/packages/patches/glib-tests-timer.patch b/gnu/packages/patches/glib-tests-timer.patch
index e37425c0c8..1ac364fcc1 100644
--- a/gnu/packages/patches/glib-tests-timer.patch
+++ b/gnu/packages/patches/glib-tests-timer.patch
@@ -2,6 +2,9 @@
   fail depending on the elapsed microseconds.  Improve rounding by adding a
   fractional bit.
 
+* The /timer/stop test fails if compiler optimizations are enabled, which they
+  are by default.  Disable that test.
+
 --- glib-2.40.0/glib/tests/timer.c	2014-03-05 08:05:42.000000000 -0600
 +++ glib-2.40.0/glib/tests/timer.c	2014-07-10 16:33:12.746862822 -0500
 @@ -35,7 +35,7 @@
@@ -13,3 +16,11 @@
  
    g_timer_destroy (timer);
  }
+@@ -204,7 +204,6 @@
+   g_test_init (&argc, &argv, NULL);
+ 
+   g_test_add_func ("/timer/basic", test_timer_basic);
+-  g_test_add_func ("/timer/stop", test_timer_stop);
+   g_test_add_func ("/timer/continue", test_timer_continue);
+   g_test_add_func ("/timer/reset", test_timer_reset);
+   g_test_add_func ("/timeval/add", test_timeval_add);
diff --git a/gnu/packages/patches/gtk2-theme-paths.patch b/gnu/packages/patches/gtk2-theme-paths.patch
deleted file mode 100644
index 6c1351e516..0000000000
--- a/gnu/packages/patches/gtk2-theme-paths.patch
+++ /dev/null
@@ -1,41 +0,0 @@
-From: Jookia <166291@gmail.com>
-Subject: [PATCHv2] gtk: Patch GTK+ to look for themes in profiles.
-To: guix-devel@gnu.org
-Date: Sun, 13 Mar 2016 15:17:37 +1100
-Url: https://lists.gnu.org/archive/html/guix-devel/2016-03/msg00492.html
-
-diff -Naur gtk+-2.24.28.new/gtk/gtkrc.c gtk+-2.24.28/gtk/gtkrc.c
---- gtk+-2.24.28.new/gtk/gtkrc.c	2016-03-13 10:31:14.413644362 +1100
-+++ gtk+-2.24.28/gtk/gtkrc.c	2016-03-13 12:51:34.723398423 +1100
-@@ -808,6 +808,8 @@
-   gchar *path = NULL;
-   const gchar *home_dir;
-   gchar *subpath;
-+  const gchar * const *xdg_data_dirs;
-+  gint i;
- 
-   if (type)
-     subpath = g_strconcat ("gtk-2.0-", type,
-@@ -830,6 +832,22 @@
-     }
- 
-   if (!path)
-+    {
-+      xdg_data_dirs = g_get_system_data_dirs ();
-+      for (i = 0; xdg_data_dirs[i]; i++)
-+        {
-+          path = g_build_filename (xdg_data_dirs[i], "themes", name, subpath, NULL);
-+          if (g_file_test (path, G_FILE_TEST_EXISTS))
-+            break;
-+          else
-+            {
-+              g_free (path);
-+              path = NULL;
-+            }
-+        }
-+    }
-+
-+  if (!path)
-     {
-       gchar *theme_dir = gtk_rc_get_theme_dir ();
-       path = g_build_filename (theme_dir, name, subpath, NULL);
diff --git a/gnu/packages/pdf.scm b/gnu/packages/pdf.scm
index 74840f1c95..1d33be85d5 100644
--- a/gnu/packages/pdf.scm
+++ b/gnu/packages/pdf.scm
@@ -52,16 +52,19 @@
 (define-public poppler
   (package
    (name "poppler")
-   (version "0.42.0")
+   (version "0.37.0")
    (source (origin
             (method url-fetch)
             (uri (string-append "https://poppler.freedesktop.org/poppler-"
                                 version ".tar.xz"))
-            (sha256
-             (base32
-              "044084dbp804flwf7bw3lbwfdigm9s0psm6sw2j1hkrazrphgvwz"))))
+            (sha256 (base32
+                     "1vjvd0md8y37hlq3lsj0l01a3v3mzm572rzpn1311frvmrg9r7xq"))))
    (build-system gnu-build-system)
-   ;; FIXME:
+   ;; FIXME: more dependencies could  be added
+   ;;  cairo output:       no (requires cairo >= 1.10.0)
+   ;;  qt4 wrapper:        no
+   ;;    introspection:    no
+   ;;  use gtk-doc:        no
    ;;  use libcurl:        no
    (inputs `(("fontconfig" ,fontconfig)
              ("freetype" ,freetype)
@@ -80,8 +83,7 @@
              ("glib" ,glib)))
    (native-inputs
       `(("pkg-config" ,pkg-config)
-        ("glib" ,glib "bin")                      ; glib-mkenums, etc.
-        ("gobject-introspection" ,gobject-introspection)))
+        ("glib" ,glib "bin")))                    ; glib-mkenums, etc.
    (arguments
     `(#:tests? #f ; no test data provided with the tarball
       #:configure-flags
diff --git a/gnu/packages/xdisorg.scm b/gnu/packages/xdisorg.scm
index bb74485c76..126e997673 100644
--- a/gnu/packages/xdisorg.scm
+++ b/gnu/packages/xdisorg.scm
@@ -196,7 +196,7 @@ following the mouse.")
 (define-public pixman
   (package
     (name "pixman")
-    (version "0.34.0")
+    (version "0.32.8")
     (source (origin
               (method url-fetch)
               (uri (string-append
@@ -204,7 +204,7 @@ following the mouse.")
                     version ".tar.gz"))
               (sha256
                (base32
-                "13m842m9ffac3m9r0b4lvwjhwzg3w4353djkjpf00s0wnm4v5di1"))))
+                "0pfn0247sjsi95kwjih0wwqpp28wadihqk1bn28x6iqbqhbxwnjp"))))
     (build-system gnu-build-system)
     (inputs
      `(("libpng" ,libpng)