Arch Linux

Description:

After a system upgrade, borg fails to run with the following error:

pkg_resources.DistributionNotFound: The 'msgpack-python==0.4.6' distribution was not found and is required by borgbackup

The full message can be seen below. The only resolution I had was to revert to an older package of borg.

Additional info:
* borg 0.30.1-1
* python-msgpack 0.4.7-1

Steps to reproduce:

With borg already installed:

# pacman -Syu
# borg list
Traceback (most recent call last):
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 640, in _build_master
ws.require(__requires__)
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 941, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 833, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (msgpack-python 0.4.7 (/usr/lib/python3.5/site-packages), Requirement.parse('msgpack-python==0.4.6'), {'borgbackup'})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/bin/borg", line 5, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 3141, in <module>
@_call_aside
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 3127, in _call_aside
f(*args, **kwargs)
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 3154, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 642, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 655, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/lib/python3.5/site-packages/pkg_resources/__init__.py", line 828, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'msgpack-python==0.4.6' distribution was not found and is required by borgbackup