[This bug is targeted to the upcoming forky release]

The package build-depends or depends on python3-pkg-resources, which
is deprecated upstream. Details can be found at

https://setuptools.pypa.io/en/latest/pkg_resources.html

Use of pkg_resources is deprecated in favor of importlib.resources
and importlib.metadata. Some useful APIs are also provided by
packaging (e.g. requirements and version parsing). Users should
refrain from new usage of pkg_resources and should work to port to
importlib-based solutions.

Python 3.13 in unstable provides both importlib.resources and
importlib.metadata, so no additional dependencies on those packages
are needed.

If the package is a namespace package, then please lower the severity
again to normal.

Control: severity -1 normal

Seems to be part of a namespace package (sphinxcontrib); lowering to
normal.