diff --git a/nix/alliance-check-toolkit.nix b/nix/alliance-check-toolkit.nix
index e792a8b8..9f97c758 100644
--- a/nix/alliance-check-toolkit.nix
+++ b/nix/alliance-check-toolkit.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
   USER = "verhaegs";
 
   postPatch = "patchShebangs .";
-  configurePhase = "true";
+  configurePhase = "export CHECK_TOOLKIT=\"$PWD\"";
   buildPhase = ''
     cd benchs
     ../bin/go.sh