I'm pretty sure there are other ways to disable CSD to enable SSD in gtk than this.
Not to mention, I'm not really fond of having something in the official nixpkgs repository that's purely a "hack". Also a hack that hasn't seen contributions in 3 or so years.
I do see other distro's have packaged it

• https://repology.org/project/gtk3-nocsd/versions

but it seems to one of those things that might already be abandoned, and thusly if I were to merge this it would add to the abondonware we already have in nixpkgs.

If there are other ways to disable CSD in GTK+ 3 I haven't heard of them.

There is an active fork of gtk3-nocsd with a few fixes, so I can package that instead if that would be better.

@peanutbutter144 Yep, active forks are pretty much the only way I think this could be acceptable.

@worldofpeace are these changes acceptable to merge?

Did you close this due to my non-response @peanutbutter144? My apologies if that caused you to not want to pursue this. nixpkgs is kinda busy, and my notifications are rather hard to parse.

Do you still want to maintain this?

I closed it because 1. I don't use the library any more and 2. I don't want to maintain it.

Sorry for closing without explanation.

Thanks for explaining @peanutbutter144 👍

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/any-way-to-patch-gtk3-systemwide/59737/1