Description of problem:
Try to generate PDF throw HTML5 from Markdown using Pandoc.

Version-Release number of selected component:
weasyprint-0.22-11.fc28

Additional info:
reporter:       libreport-2.9.5
cmdline:        /usr/bin/python3 /usr/bin/weasyprint - ./html2pdf10302-0.pdf
crash_function: resolve
exception_type: pkg_resources.DistributionNotFound
executable:     /usr/bin/weasyprint
interpreter:    python3-3.6.6-1.fc28.x86_64
kernel:         4.17.18-200.fc28.x86_64
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
__init__.py:774:resolve:pkg_resources.DistributionNotFound: The 'WeasyPrint==0.22' distribution was not found and is required by the application

Traceback (most recent call last):
  File "/usr/bin/weasyprint", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 3095, in <module>
    @_call_aside
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 3079, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 3108, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 570, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 888, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.6/site-packages/pkg_resources/__init__.py", line 774, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'WeasyPrint==0.22' distribution was not found and is required by the application

Local variables in innermost frame:
requirers: None
ws: <pkg_resources.WorkingSet object at 0x7f22b03214a8>
dist: None
req: Requirement.parse('WeasyPrint==0.22')
required_by: defaultdict(<class 'set'>, {})
req_extras: {}
to_activate: []
best: {'weasyprint': None}
processed: {}
extras: None
replace_conflicting: False
installer: None
env: <pkg_resources.Environment object at 0x7f22b0321a58>
requirements: []
self: <pkg_resources.WorkingSet object at 0x7f22b03214a8>