Created attachment 4594
Parole fails to build twice, because the UI headers generated with xdt-csource are deleted during clean but created only with maintainer mode enabled.
The attached patch fixes this issue for me (I'm not sure it's the best way to do it though :P).
Thanks for the bug report and the patch. I have incorporated your patch in my most recent commit. Please test again and let me know that everything still works for you.
We haven't heard any news on this, but builds are working fine. I'm closing this one out.
If you have any more troubles, please file a new bug.