Set PYLINT_PYPY_SHIM_STRICT=1 to fail fast when the current Pylint or Astroid
version is outside the supported range:
PYLINT_PYPY_SHIM_STRICT=1 pylint-pypy your_package
Only the exact value 1 enables strict mode. Other values, such as true or
yes, are treated as disabled so unrelated shell configuration does not
accidentally activate the failure path.