build-support/makeDesktopItem: make overridable

pkgs/build-support/make-desktopitem/default.nix

@@ -4,7 +4,7 @@
 # Please keep in spec order for easier maintenance.
 # When adding a new value, don't forget to update the Version field below!
 # See https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html
-{ name # The name of the desktop file
+lib.makeOverridable ({ name # The name of the desktop file
 , type ? "Application"
 # version is hardcoded
 , desktopName # The name of the application
@@ -115,4 +115,4 @@ writeTextFile {
   destination = "/share/applications/${name}.desktop";
   text = builtins.concatStringsSep "\n" content;
   checkPhase = ''${buildPackages.desktop-file-utils}/bin/desktop-file-validate "$target"'';
-}
+})