PIL is not setuptools compatible. Please see `this Image-SIG post`_ for a more detailed explanation. Also, PIL's bi-yearly (or greater) release schedule was too infrequent to accommodate the large number and frequency of issues reported.
The last PIL release was in 2009 (1.1.7) and `no future releases are expected <https://github.com/python-pillow/Pillow/issues/1535>`_. In January 2020, `the PyPI moderators exhausted the PEP 541 process for contacting the PIL project owner <https://github.com/python-pillow/Pillow/issues/1535#issuecomment-570308446>`_ and the `PIL project on PyPI <https://pypi.org/project/PIL>`_ was transferred to the `Pillow team <https://github.com/python-pillow/Pillow/graphs/contributors>`_. The Pillow team has no plans to update the PIL project on PyPI.