From 7832806e205493482b349c0a53dbc3e4b1412456 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Wed, 15 Feb 2017 21:06:27 +0100
Subject: [PATCH] fontconfig: fixup fragile build after ab5fe171a

Sometimes it might fail due to timestamps suggesting some files needed
regenerating and failing to find gperf.  Now it should be OK, I hope.
---
 pkgs/development/libraries/fontconfig/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/fontconfig/default.nix b/pkgs/development/libraries/fontconfig/default.nix
index 58ca7c41891..14983b744df 100644
--- a/pkgs/development/libraries/fontconfig/default.nix
+++ b/pkgs/development/libraries/fontconfig/default.nix
@@ -34,9 +34,10 @@ stdenv.mkDerivation rec {
       sha256 = "0x2a4qx51j3gqcp1kp4lisdzmhrkw1zw0r851d82ksgjlc0vkbaz";
     })
   ];
-  # additionally required for the glibc-2.25 patch
+  # additionally required for the glibc-2.25 patch; avoid requiring gperf
   postPatch = ''
     sed s/CHAR_WIDTH/CHARWIDTH/g -i src/fcobjshash.{h,gperf}
+    touch src/*
   '';
 
   outputs = [ "bin" "dev" "lib" "out" ]; # $out contains all the config