diff --git a/pkgs/development/libraries/physics/geant4/default.nix b/pkgs/development/libraries/physics/geant4/default.nix
index 958720be37a0..6c143de91a19 100644
--- a/pkgs/development/libraries/physics/geant4/default.nix
+++ b/pkgs/development/libraries/physics/geant4/default.nix
@@ -111,6 +111,8 @@ stdenv.mkDerivation rec {
       };
 
     tests = callPackage ./tests.nix {};
+
+    inherit enableQt;
   };
 
   # Set the myriad of envars required by Geant4 if we use a nix-shell.