trivial-builders: add rmDbusServicesInPlace for when the symlink method isnt applicable

pkgs/additional/trivial-builders/default.nix

@@ -1,4 +1,5 @@
 { runCommand
+, rmDbusServicesInPlace
 , symlinkJoin
 }:
 {
@@ -27,10 +28,19 @@
   # given some package, create a new package which symlinks every file of the original
   # *except* for its dbus files.
   # in addition, edit its .desktop files to clarify that it can't be "dbus activated".
-  rmDbusServices = pkg: symlinkJoin {
+  rmDbusServices = pkg: rmDbusServicesInPlace (symlinkJoin {
     name = pkg.name or pkg.pname;
     paths = [ pkg ];
     postBuild = ''
+      runHook postFixup
+    '';
+  });
+
+  # like rmDbusServices, but do it by patching the derivation instead of wrapping it.
+  # unlike `rmDbusServices`, this won't work on *all* derivation types (e.g. runCommand), so you should
+  # check the output to see it's what you want.
+  rmDbusServicesInPlace = pkg: pkg.overrideAttrs (base: {
+    postFixup = (base.postFixup or "") + ''
       rm -rf $out/share/dbus-1
       for d in $out/share/applications/*.desktop; do
         if substitute "$d" ./substituteResult --replace-fail DBusActivatable=true DBusActivatable=false; then
@@ -38,5 +48,5 @@
         fi
       done
     '';
-  };
+  });
 }

pkgs/default.nix

@@ -69,6 +69,7 @@ let
       copyIntoOwnPackage
       linkIntoOwnPackage
       rmDbusServices
+      rmDbusServicesInPlace
     ;
     unftp = callPackage ./additional/unftp { };
     where-am-i = callPackage ./additional/where-am-i { };