From 086d6c802b26c11ff7b01b4733de0e3b1b2c1c8d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Sun, 13 Apr 2014 14:56:54 +0200
Subject: [PATCH] tk on darwin: another attempt to fix build

They add the -lfontconfig explicitly in macports, so hopefully it fixes it.
https://trac.macports.org/browser/trunk/dports/x11/tk/Portfile
---
 pkgs/development/libraries/tk/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/libraries/tk/default.nix b/pkgs/development/libraries/tk/default.nix
index 2757a2543859..fd3684d189c8 100644
--- a/pkgs/development/libraries/tk/default.nix
+++ b/pkgs/development/libraries/tk/default.nix
@@ -21,6 +21,8 @@ stdenv.mkDerivation {
   buildInputs = [ pkgconfig tcl libXft ]
     ++ stdenv.lib.optional stdenv.isDarwin fontconfig;
 
+  NIX_CFLAGS_LINK = if stdenv.isDarwin then "-lfontconfig" else null;
+
   inherit tcl;
 
   passthru = {