The txt and ini files are installed to the wrong location: ``` [ 26s] error: Installed (but unpackaged) file(s) found: [ 26s] /usr/lib/python3.11/site-packages/COPYING.txt [ 26s] /usr/lib/python3.11/site-packages/README.rst [ 26s] /usr/lib/python3.11/site-packages/pytest.ini [ 26s] /usr/lib/python3.11/site-packages/tox.ini ``` The txt files should be in the django_mailman3 sub-directory and it doesn't make sense to install the ini files :-)