Arch Linux

Description:
borg & all dependencies are installed as usual, however borg dumps stack trace complaining about missing dependency (which is installed)

Additional info:
borg 1.1.6-1
python-msgpack 0.5.6-1


Steps to reproduce:
1. Install borg 1.1.6-1
2. Run borg
3. Error

Log:
[user@host ~]$ borg
Traceback (most recent call last):
File "/usr/bin/borg", 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 'msgpack-python!=0.5.0,!=0.5.1,!=0.5.2,!=0.5.3,!=0.5.4,!=0.5.5,<=0.5.6,>=0.4.6' distribution was not found and is required by borgbackup