Traceback (most recent call last):
  File "/usr/bin/pull-lp-source", line 11, in <module>
    PullPkg.main(distro='ubuntu', pull='source')
  File "/usr/lib/python3/dist-packages/ubuntutools/pullpkg.py", line 107, in main
    cls(*args, **kwargs).pull()
  File "/usr/lib/python3/dist-packages/ubuntutools/pullpkg.py", line 400, in pull
    params = self._get_params(options)
  File "/usr/lib/python3/dist-packages/ubuntutools/pullpkg.py", line 318, in _get_params
    (r, v, p) = self.parse_release_and_version(distro, options['release'],
  File "/usr/lib/python3/dist-packages/ubuntutools/pullpkg.py", line 267, in parse_release_and_version
    (release, pocket) = self.parse_release(distro, release)
  File "/usr/lib/python3/dist-packages/ubuntutools/pullpkg.py", line 254, in parse_release
    d = Distribution(distro)
  File "/usr/lib/python3/dist-packages/ubuntutools/lp/lpapicache.py", line 174, in __new__
    if isinstance(fetch, collections.Callable):
AttributeError: module 'collections' has no attribute 'Callable'