From a839a48b0ac1aef11faa812eb6648e6449cd0bc0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Tue, 1 Sep 2015 08:21:46 +0200
Subject: [PATCH] root: fix build by -lX11

The pkgconfig change didn't help, but I'd leave it in.
---
 pkgs/applications/science/misc/root/default.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/applications/science/misc/root/default.nix b/pkgs/applications/science/misc/root/default.nix
index 57d9fc40ab5..e61cb557e12 100644
--- a/pkgs/applications/science/misc/root/default.nix
+++ b/pkgs/applications/science/misc/root/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, cmake, mesa, gfortran
+{ stdenv, fetchurl, fetchpatch, cmake, pkgconfig, mesa, gfortran
 , libX11,libXpm, libXft, libXext, zlib }:
 
 stdenv.mkDerivation rec {
@@ -10,7 +10,9 @@ stdenv.mkDerivation rec {
     sha256 = "1bkiggcyya39a794d3d2rzzmmkbdymf86hbqhh0l1pl4f38xvp6i";
   };
 
-  buildInputs = [ cmake gfortran mesa libX11 libXpm libXft libXext zlib ];
+  buildInputs = [ cmake pkgconfig gfortran mesa libX11 libXpm libXft libXext zlib ];
+
+  NIX_CFLAGS_LINK = "-lX11";
 
   # CMAKE_INSTALL_RPATH_USE_LINK_PATH is set to FALSE in
   # <rootsrc>/cmake/modules/RootBuildOptions.cmake.