gnu: zlib: Use 'modify-phases' syntax.

* gnu/packages/compression.scm (zlib)[arguments]: Use 'modify-phases'.

gnu/packages/compression.scm

@@ -64,8 +64,9 @@
         "18dighcs333gsvajvvgqp8l4cx7h1x7yx9gd5xacnk80spyykrf3"))))
     (build-system gnu-build-system)
     (arguments
-     `(#:phases (alist-replace
-                 'configure
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'configure
            (lambda* (#:key outputs #:allow-other-keys)
              ;; Zlib's home-made `configure' fails when passed
              ;; extra flags like `--enable-fast-install', so we need to
@@ -77,8 +78,7 @@
                      '())
                (zero?
                 (system* "./configure"
-                               (string-append "--prefix=" out)))))
-                 %standard-phases)))
+                         (string-append "--prefix=" out)))))))))
     (home-page "http://zlib.net/")
     (synopsis "Compression library")
     (description