running into issues when upgrading flake8 to 6.0.0:

ERROR: Could not find a version that satisfies the requirement flake8==6.0.0
ERROR: No matching distribution found for flake8==6.0.0

Requires: Python >=3.8.1

also tried different versions of pants including 2.16

[GLOBAL]
backend_packages = [
  "pants.backend.python",
  "pants.backend.python.lint.black",
  "pants.backend.python.lint.flake8",
  "pants.backend.python.lint.isort",
  "pants.backend.build_files.fmt.black",
]
pants_version = "2.15.0rc2"

[python]
enable_resolves = true
interpreter_constraints = ["CPython==3.8.*"]
tailor_pex_binary_targets = false

So read your IC closely

oh

And realize Pex is keeping you very honest.

wow

3.8.0 is included in *

thanks for the tip

I guessed, then read: https://pypi.org/project/flake8/