>From e2fe29485a1f65d65fd7db5b6111d4cfe8ca1485 Mon Sep 17 00:00:00 2001
From: ison <address@hidden>
Date: Thu, 6 Jun 2019 22:46:12 -0600
Subject: [PATCH] Fix fontforge source date epoch

---
 gnu/packages/fontutils.scm | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/fontutils.scm b/gnu/packages/fontutils.scm
index 1982d0bf4b..44107277cb 100644
--- a/gnu/packages/fontutils.scm
+++ b/gnu/packages/fontutils.scm
@@ -555,6 +555,8 @@ definitions.")
 (define-public fontforge
   (package
    (name "fontforge")
+   ;; SOURCE_DATE_EPOCH generated from version string
+   ;; expects format YYYYMMDD
    (version "20190317")
    (source (origin
             (method url-fetch)
@@ -592,7 +594,18 @@ definitions.")
              ("python"          ,python-2)
              ("zlib"            ,zlib)))
    (arguments
-    '(#:phases
+    `(#:modules ((guix build utils)
+                 (guix build gnu-build-system)
+                 (srfi srfi-19))
+      #:configure-flags
+      (list (format #f "SOURCE_DATE_EPOCH=~a"
+                    (time-second
+                      (date->time-utc
+                        (string->date
+                          (string-append ,version
+                                         "-0000")
+                          "~Y~m~d~z")))))
+      #:phases
       (modify-phases %standard-phases
         (add-after 'install 'set-library-path
           (lambda* (#:key inputs outputs #:allow-other-keys)
-- 
2.21.0