html5lib ftbfs with setuptools v84, the testsuite also references the
pkg_resources module:

[...]
dh clean --buildsystem=pybuild
    dh_auto_clean -O--buildsystem=pybuild
I: pybuild base:385: python3.14 setup.py clean
Traceback (most recent call last):
   File "/packages/tmp/html5lib-1.2/setup.py", line 8, in <module>
     from pkg_resources import parse_version
ModuleNotFoundError: No module named 'pkg_resources'
E: pybuild pybuild:485: clean: plugin distutils failed with: exit
code=1: python3.14 setup.py clean
dh_auto_clean: error: pybuild --clean -i python{version} -p 3.14
--parallel=16 returned exit code 13
make: *** [debian/rules:8: clean] Error 25