From e9e6d40b2292c4a3fbc86bee6a7146eaba59c075 Mon Sep 17 00:00:00 2001
From: Danny Milosavljevic <dannym@scratchpost.org>
Date: Tue, 29 Aug 2017 07:58:36 +0200
Subject: [PATCH] gnu: groff: Make build reproducible.

* gnu/packages/groff.scm (groff)[arguments]: Add phase "setenv".
---
 gnu/packages/groff.scm | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/groff.scm b/gnu/packages/groff.scm
index 67dd1dbfa6..6e1a60e9ba 100644
--- a/gnu/packages/groff.scm
+++ b/gnu/packages/groff.scm
@@ -56,7 +56,14 @@
                     ("perl" ,perl)
                     ("psutils" ,psutils)
                     ("texinfo" ,texinfo)))
-   (arguments '(#:parallel-build? #f))  ; parallel build fails
+   (arguments
+    `(#:parallel-build? #f   ; parallel build fails
+      #:phases
+      (modify-phases %standard-phases
+        (add-after 'unpack 'setenv
+          (lambda _
+            (setenv "GS_GENERATE_UUIDS" "0")
+            #t)))))
    (synopsis "Typesetting from plain text mixed with formatting commands")
    (description
     "Groff is a typesetting package that reads plain text and produces