Description:

After upgrading pyflakes and python2-pyflakes version to 0.9.0-1 , flake8 and python2-flake8 of version 1:2.4.1-1 break because they require pyflakes version as pyflakes<0.9,>=0.8.1

Additional info:
* package version(s)

pyflakes, python2-pyflakes: 0.9.0-1
flake8, python2-flake8: 1:2.4.1-1

* config and/or log files etc.

The output of flake8 is like this:

$ flake8
Traceback (most recent call last):
File "/usr/lib/python3.4/site-packages/pkg_resources/__init__.py", line 645, in _build_master
ws.require(__requires__)
File "/usr/lib/python3.4/site-packages/pkg_resources/__init__.py", line 946, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python3.4/site-packages/pkg_resources/__init__.py", line 838, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (pyflakes 0.9.0 (/usr/lib/python3.4/site-packages), Requirement.parse('pyflakes<0.9,>=0.8.1'), {'flake8'})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/bin/flake8", line 5, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python3.4/site-packages/pkg_resources/__init__.py", line 3074, in <module>
@_call_aside
File "/usr/lib/python3.4/site-packages/pkg_resources/__init__.py", line 3060, in _call_aside
f(*args, **kwargs)
File "/usr/lib/python3.4/site-packages/pkg_resources/__init__.py", line 3087, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python3.4/site-packages/pkg_resources/__init__.py", line 647, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/lib/python3.4/site-packages/pkg_resources/__init__.py", line 660, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/lib/python3.4/site-packages/pkg_resources/__init__.py", line 833, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pyflakes<0.9,>=0.8.1' distribution was not found and is required by flake8

Steps to reproduce:

1. Do a full system upgrade with pacman -Syu
2. Run flake8 or flake8-python2 in shell