python setup.py build_ext --inplaceStrict diagnostics:
YOUNGLION_STRICT=1 python setup.py build_ext --inplace --forcePEP 517 distributions:
python -m pip install build
python -m buildRelease verification should unpack the sdist into a clean directory, rebuild there, run tests, build/install a wheel in a fresh venv with --no-deps, and run smoke imports.