diff --git a/artiq/windows/default.nix b/artiq/windows/default.nix
index 3377b10..7e7d190 100644
--- a/artiq/windows/default.nix
+++ b/artiq/windows/default.nix
@@ -10,9 +10,9 @@ with pkgs;
 
 let
   windowsRunner = overrides:
-    import ./run-test.nix {
+    import ./run-test.nix ({
       inherit pkgs diskImage qemuMem testTimeout;
-    };
+    } // overrides);
 in
 
 stdenv.mkDerivation {