As recently as four days ago, [tests were passing](https://github.com/pypa/setuptools/actions/runs/8837280341). A day later, one test (test_license_is_a_string), [started failing](https://github.com/pypa/setuptools/actions/runs/8853717171/job/24315188999). Today, the package [fails to build/install at all](https://github.com/pypa/setuptools/actions/runs/8881665750). All of these jobs are on the same commit (0156e248e).