It would be really nice to open submitting issue tickets over github because submitting issues over email is hard to trace.
+ sphinx-build -a -b man -t pathsubs doc build-man
Running Sphinx v4.0.2
making output directory... done
File "/home/tkloczko/rpmbuild/BUILD/krb5-1.19.1/doc/conf.py", line 102, in setup
AttributeError: 'Sphinx' object has no attribute 'add_stylesheet'
The full traceback has been saved in /tmp/sphinx-err-gmml44ha.log, if you want to report the issue to the developers.
Please also report this if it was a user error, so that a better error message can be provided next time.
A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues
error: Bad exit status from /var/tmp/rpm-tmp.ua2vw7 (%build)