diff --git a/pkgs/development/compilers/llvm/4/llvm.nix b/pkgs/development/compilers/llvm/4/llvm.nix
index 17a25889e64f..ceaa45fe8d73 100644
--- a/pkgs/development/compilers/llvm/4/llvm.nix
+++ b/pkgs/development/compilers/llvm/4/llvm.nix
@@ -65,7 +65,7 @@ in stdenv.mkDerivation (rec {
     substitute '${./llvm-outputs.patch}' ./llvm-outputs.patch --subst-var lib
     patch -p1 < ./llvm-outputs.patch
   ''
-  + stdenv.lib.optionalString (stdenv ? glibc) ''
+  + ''
     (
       cd projects/compiler-rt
       patch -p1 < ${