Comment # 1 on bug 1151703 from Benjamin Greiner

Fixed itself with a recent setuptools and Python 3.8 (importlib.resources
instead of pkg_resources for entry points.)

Old Leap distributions with old setuptools still need it:
https://build.opensuse.org/request/show/990020

Note that pkg_resources from setuptools is required in plain Leap 15.x for
EVERY python package having entry points.