bitmask package gives: pkg_resources.DistributionNotFound: psutil<2.0

Trying to run the package on debian sid, I'm getting this:

$ bitmask --danger
  File "/usr/bin/bitmask", line 5, in 
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2749, in 
    working_set = WorkingSet._build_master()
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 446, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 459, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 628, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: psutil<2.0

(from redmine: created on 2014-05-06, closed on 2014-05-21, relates #4834 (closed), relates #5689 (closed))