ukmm: add updateScript

pkgs/tools/games/ukmm/default.nix

@@ -7,6 +7,7 @@
 , atk
 , glib
 , gtk3-x11
+, nix-update-script
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -66,6 +67,8 @@ rustPlatform.buildRustPackage rec {
     "--skip=bnp::test_convert"
   ];
 
+  passthru.updateScript = nix-update-script { };
+
   meta = with lib; {
     description = "A new mod manager for The Legend of Zelda: Breath of the Wild";
     homepage = "https://github.com/NiceneNerd/ukmm";