flake8 5 breaks plugin no attribute ConfigFileFinder

[jaraco]

Setuptools tests have started failing in the pytest-flake8 plugin:

AttributeError: module 'flake8.options.config' has no attribute 'ConfigFileFinder'

[PackeTsar]

I'm having the same problem

[tdenewiler]

This is affecting us as well, copying the same fix as others.

https://github.com/sscpac/statick

[jvavrek]

I had the same problem with versions 5.0.0 and up of flake8. FWIW, some of the pytest devs now consider using flake8 within pytest to be an anti-pattern, and prefer doing flake8/black/etc. checks using pre-commit: pytest-dev/pytest#9217 (comment)