remove all references to `stdenv.cc.cc.is{GNU,Clang}`

use the new `stdenv.cc.is{GNU,Clang}` instead, which will always be
defined.

1 files changed, 1 insertions, 1 deletions

diff --git a/pkgs/development/compilers/llvm/3.5/clang.nix b/pkgs/development/compilers/llvm/3.5/clang.nix
index 2398b0c59ac5..05ac4be01e5f 100644
--- a/pkgs/development/compilers/llvm/3.5/clang.nix
+++ b/pkgs/development/compilers/llvm/3.5/clang.nix
@@ -1,6 +1,6 @@
 { stdenv, fetch, cmake, libxml2, libedit, llvm, version, clang-tools-extra_src }:
 let
-  gcc = if stdenv.cc.cc.isGNU or false then stdenv.cc.cc else stdenv.cc.cc.gcc;
+  gcc = if stdenv.cc.isGNU then stdenv.cc.cc else stdenv.cc.cc.gcc;
 in stdenv.mkDerivation {
   name = "clang-${version}";