From dd4dfee2c2eab09d3e696eb24e17abd1d8b8402a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Fri, 26 Dec 2014 22:02:29 +0100
Subject: [PATCH] qt5: work around a build problem

---
 pkgs/development/libraries/qt-5/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/libraries/qt-5/default.nix b/pkgs/development/libraries/qt-5/default.nix
index 3f75e6aeb9b..98fd20c44c0 100644
--- a/pkgs/development/libraries/qt-5/default.nix
+++ b/pkgs/development/libraries/qt-5/default.nix
@@ -160,6 +160,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ python perl pkgconfig ];
 
+  # freetype-2.5.4 changed signedness of some struct fields
+  NIX_CFLAGS_COMPILE = "-Wno-error=sign-compare";
+
   postInstall =
     ''
       ${optionalString buildDocs ''