diff --git a/pkgs/applications/science/logic/zchaff/default.nix b/pkgs/applications/science/logic/zchaff/default.nix
index 8eedd9b43e5..5fd73a8def8 100644
--- a/pkgs/applications/science/logic/zchaff/default.nix
+++ b/pkgs/applications/science/logic/zchaff/default.nix
@@ -1,6 +1,6 @@
-{ lib, stdenv, fetchurl }:
+{ lib, clangStdenv, fetchurl }:
 
-stdenv.mkDerivation rec {
+clangStdenv.mkDerivation rec {
   pname = "zchaff";
   version = "2004.5.13";
 
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   patches = [ ./sat_solver.patch ];
-  makeFlags = [ "CC=${stdenv.cc.targetPrefix}c++" ];
+  makeFlags = [ "CC=${clangStdenv.cc.targetPrefix}c++" ];
   installPhase= ''
     runHook preInstall
     install -Dm755 -t $out/bin zchaff