2.1: sphinx warnings reference target not found

[kloczek]

On building my packages I'm using sphinx-build command with -n switch which shows warmings about missing references. These are not critical issues.
Here is the output with warnings:

+ /usr/bin/sphinx-build -n -T -b man docs build/sphinx/man
Running Sphinx v4.5.0
running test
WARNING: Testing via this command is deprecated and will be removed in a future version. Users looking for a generic test entry point independent of test runner are encouraged to use tox.
running egg_info
writing repoze.tm2.egg-info/PKG-INFO
writing dependency_links to repoze.tm2.egg-info/dependency_links.txt
writing entry points to repoze.tm2.egg-info/entry_points.txt
writing namespace_packages to repoze.tm2.egg-info/namespace_packages.txt
writing requirements to repoze.tm2.egg-info/requires.txt
writing top-level names to repoze.tm2.egg-info/top_level.txt
reading manifest file 'repoze.tm2.egg-info/SOURCES.txt'
adding license file 'LICENSE.txt'
writing manifest file 'repoze.tm2.egg-info/SOURCES.txt'
running build_ext
..........................
----------------------------------------------------------------------
Ran 26 tests in 0.001s

OK
making output directory... done
building [mo]: targets for 0 po files that are out of date
building [man]: all manpages
updating environment: [new config] 3 added, 0 changed, 0 removed
reading sources... [100%] index
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
writing... python-repoze-tm2.3 { api changes } /home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:7: WARNING: py:mod reference target not found: repoze.tm2
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:11: WARNING: py:mod reference target not found: repoze.tm2
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:75: WARNING: py:mod reference target not found: repoze.tm2
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:354: WARNING: py:mod reference target not found: repoze.tm2
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:357: WARNING: py:mod reference target not found: repoze.tm2
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:357: WARNING: py:mod reference target not found: repoze.tm2
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:357: WARNING: py:mod reference target not found: repoze.tm2
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:372: WARNING: py:mod reference target not found: repoze.tm2
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:372: WARNING: py:func reference target not found: repoze.tm.isActive
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:382: WARNING: py:meth reference target not found: repoze.tm.AfterEnd.register
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/index.rst:397: WARNING: py:mod reference target not found: repoze.tm2
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/api.rst:1: WARNING: py:mod reference target not found: repoze.tm2
/home/tkloczko/rpmbuild/BUILD/repoze.tm2-2.1/docs/changes.rst:1: WARNING: py:mod reference target not found: repoze.tm2
done
build succeeded, 13 warnings.