diff --git a/pkgs/games/gemrb/default.nix b/pkgs/games/gemrb/default.nix
index f3f50a662406..ca974d63de2d 100644
--- a/pkgs/games/gemrb/default.nix
+++ b/pkgs/games/gemrb/default.nix
@@ -1,5 +1,7 @@
 { stdenv, fetchurl, cmake, SDL, openal, zlib, libpng, python, libvorbis }:
 
+assert stdenv.gcc.libc != null;
+
 stdenv.mkDerivation rec {
   name = "gemrb-0.6.1";