Created attachment 654618 [details] Patch There's a new problem with the patch for setup.py, introduced by https://github.com/kovidgoyal/kitty/commit/6ca1b7c240eb328817d282e780aa13eb2f741287. I've made a patch that fixes it on my end.
Created attachment 654620 [details, diff] Patch This should be viewable within the bugtracker as a patch.
I've already made a PR on Github that solves this, so it shouldn't take long until it gets accepted and merged into the main tree. Thank you very much nonetheless for reporting it!