When using rst2html5 from opensuse repo I get message:

Traceback (most recent call last):
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 659,
in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 967,
in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 858,
in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (Pygments 2.1.3
(/usr/lib/python3.5/site-packages), Requirement.parse('Pygments==2.0.2'),
{'rst2html5'})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/rst2html5", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 3017,
in <module>
    @_call_aside
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 3003,
in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 3030,
in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 661,
in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 674,
in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 853,
in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'Pygments==2.0.2' distribution was not
found and is required by rst2html5
make: *** [GNUmakefile:55: build/htdocs/pages/checklist.html] Error 1

It looks like rst2html5 needs to be updates.