opentabletdriver: fix wrapping the GUI binary with GTK stuff

Previously when removing the wrapper hook, nothing changed in the
output, it had no effect.
I'm not sure if it's required to wrap it for dotnet since it didn't
cause any issues, but since it's a GTK app let's do it anyways.

pkgs/by-name/op/opentabletdriver/package.nix

@@ -91,6 +91,8 @@ buildDotnetModule (finalAttrs: {
       --replace-fail '/usr/bin/env rm' '${lib.getExe' coreutils "rm"}'
   '';
 
+  dontWrapGApps = true;
+
   postFixup = ''
     # Give a more "*nix" name to the binaries
     mv $out/bin/OpenTabletDriver.Console $out/bin/otd
@@ -102,6 +104,9 @@ buildDotnetModule (finalAttrs: {
     # Generate udev rules from source
     mkdir -p $out/lib/udev/rules.d
     ./generate-rules.sh > $out/lib/udev/rules.d/70-opentabletdriver.rules
+
+    wrapProgram $out/bin/otd-gui \
+      "''${gappsWrapperArgs[@]}"
   '';
 
   desktopItems = [