Error: ati drivers are no longer supported by any kernel >=4.1

I tried to update from 21.05 to unstable, but trying to rebuild the system, I got an error telling me ATI drivers aren’t supported, but I can’t see why they would be brought in since I don’t specify it anywhere. The error comes from here:

Config files:

Backtrace when trying to rebuild:

Break down your config to a minimal reproducer; find out which line causes it.

Then open an issue upstream.