Hi jgart, > validating 'flake8' > /gnu/store/zaw5z708sldm6v3qxjczcia7gl65dw5x-python-flake8-3.9.2/lib/python3.9/site-packages > ...checking requirements: ERROR: flake8==3.9.2 > ContextualVersionConflict(pyflakes 2.4.0 > (/gnu/store/mxkp1zl64cd3i247shp7njkxad8v13x9-python-pyflakes-2.4.0/lib/python3.9/site-packages), > Requirement.parse('pyflakes<2.4.0,>=2.3.0'), {'flake8'}) I believe this was fixed in Guix proper already by upgrading to 4.0.1 and loosening the version checks. In any case it’s not a problem with the library you are trying to package.
Cheers, Lars