From 407c60fdf9d5b6ad97e5b2d24e779815e28d7f3f Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Mon, 20 Jan 2014 20:33:02 -0500
Subject: [PATCH] Fix tarball

Signed-off-by: Shea Levy <shea@shealevy.com>
---
 pkgs/development/compilers/llvm/3.4/clang.nix | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/compilers/llvm/3.4/clang.nix b/pkgs/development/compilers/llvm/3.4/clang.nix
index 22a1e112b9d..6f174a411cb 100644
--- a/pkgs/development/compilers/llvm/3.4/clang.nix
+++ b/pkgs/development/compilers/llvm/3.4/clang.nix
@@ -21,11 +21,11 @@ stdenv.mkDerivation {
 
   cmakeFlags = [
     "-DCMAKE_BUILD_TYPE=Release"
-    "-DGCC_INSTALL_PREFIX=${stdenv.gcc.gcc}"
-    "-DC_INCLUDE_DIRS=${stdenv.gcc.libc}/include/"
     "-DCMAKE_CXX_FLAGS=-std=c++11"
     "-DCLANG_PATH_TO_LLVM_BUILD=${llvm}"
-  ];
+  ] ++
+  (stdenv.lib.optional (stdenv.gcc.libc != null) "-DC_INCLUDE_DIRS=${stdenv.gcc.libc}/include") ++
+  (stdenv.lib.optional (stdenv.gcc.gcc != null) "-DGCC_INSTALL_PREFIX=${stdenv.gcc.gcc}");
 
   passthru.gcc = stdenv.gcc.gcc;