Description: Neither ykman (yubikey-manager) and ykman-gui (yubikey-manager-qt) will launch due to missing dependency pyopenssl (python-pyopenssl).


Additional info:
* yubikey-manager (0.4.0-1)
* yubikey-manager-qt (0.3.0.r9.gd14158c0-4)


Steps to reproduce:
$ ykman
Traceback (most recent call last):
File "/usr/sbin/ykman", line 6, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 3037, in <module>
@_call_aside
File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 3021, in _call_aside
f(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 3050, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 655, in _build_master
ws.require(__requires__)
File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 969, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 855, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pyopenssl' distribution was not found and is required by yubikey-manager

Similar error from launching the QT version.

I was able to resolve the issue by installing the python-pyopenssl (17.0.0-1) package from the extra repository.