Description:
aur/python2-imaging provides python2-pillow=1.0, and mitmproxy requires Pillow>=3.0.0. If I have python2-imaging installed beforehand, I get errors from loading mitmproxy:

$ mitmproxy
Traceback (most recent call last):
File "/usr/bin/mitmproxy", line 5, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3138, in <module>
@_call_aside
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3124, in _call_aside
f(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3151, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 661, in _build_master
ws.require(__requires__)
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 962, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 849, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'Pillow<3.1,>=3.0.0' distribution was not found and is required by mitmproxy

Could you make mitmproxy depends on python2-pillow>=3.0.0?

Additional info:
aur/python2-imaging 1.1.7-11
community/mitmproxy 0.15-2

Steps to reproduce:
$ yaourt -S --asdeps python2-imaging
$ yaourt -S mitmproxy
$ mitmproxy