Install the shim into the same environment that runs Pylint:
python -m pip install pylint-pypy-shim
For an isolated PyPy invocation with uv, ask uv to create the tool
environment with PyPy:
uv tool run --python pypy --from pylint-pypy-shim pylint-pypy --version
The package depends on Pylint 4.x and Astroid 4.x. Those dependency bounds are
declared in pyproject.toml, so normal package installation will resolve a
compatible pair.