diff --git a/pkgs/development/compilers/llvm/clang.nix b/pkgs/development/compilers/llvm/clang.nix
index 38da51b9c27a..78b3219a3284 100644
--- a/pkgs/development/compilers/llvm/clang.nix
+++ b/pkgs/development/compilers/llvm/clang.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, perl, groff, llvm }:
 
-assert stdenv.isLinux;
+assert stdenv.isLinux && stdenv.gcc.gcc != null;
 
 let version = "2.9"; in