Support for raspberry pi: setuptools version, no polkit authentication agent found

I know this is far from our priorities but I tried usign bitmask-dev on a raspberry pi in order to create a DIY VPN-router. Of course the bundle doesn't work because the pi is ARM architecture, so I tried building it. Here's the build log: make.dev-backend.log

Starting bitmaskctl complains about the wrong setuptools version:

(venv)pi@raspberrypi:~/bitmask-dev $ bitmaskctl
Traceback (most recent call last):
  File "/home/pi/bitmask-dev/venv/bin/bitmaskctl", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/home/pi/bitmask-dev/venv/local/lib/python2.7/site-packages/pkg_resources.py", line 2876, in <module>
    working_set = WorkingSet._build_master()
  File "/home/pi/bitmask-dev/venv/local/lib/python2.7/site-packages/pkg_resources.py", line 451, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/home/pi/bitmask-dev/venv/local/lib/python2.7/site-packages/pkg_resources.py", line 464, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/home/pi/bitmask-dev/venv/local/lib/python2.7/site-packages/pkg_resources.py", line 644, in resolve
    raise VersionConflict(dist, req)
pkg_resources.VersionConflict: (setuptools 5.5.1 (/home/pi/bitmask-dev/venv/lib/python2.7/site-packages), Requirement.parse('setuptools>=11.3'))

I needed to upgrade setuptools like this to make it work:

pip install setuptools --upgrade

Please fix the installation process so this step is not needed and installation works flawlessly.