Add nixos-module-contrib override

Author: adisbladis

overrides.nix

@@ -7,4 +7,10 @@ self: super: {
       nativeBuildInputs = nativeBuildInputs ++ [ self.poetry ];
     }
   );
-}
+  nixos-modules-contrib = super.nixos-modules-contrib.overridePythonAttrs (
+    { nativeBuildInputs ? [], ... }: {
+      format = "pyproject";
+      nativeBuildInputs = nativeBuildInputs ++ [ self.poetry ];
+    }
+  );
+}