⚠️ ⚠️ ⚠️  STOP! ⚠️ ⚠️ ⚠️

This test suite tinkers with your system, and has lots of expectations about
the system it is running on, so we HIGHLY recommend you run it using the
provided Dockerfile:

  docker buildx build --file .github/actions/pie-behaviour-tests/Dockerfile -t pie-behat-test .
  docker run --volume .:/github/workspace -ti pie-behat-test

If you are really sure, and accept that the test suite installs/uninstalls
stuff from your system, and might break your stuff, set
USING_PIE_BEHAT_DOCKERFILE=1 in your environment.