Traceback (most recent call last):
  File "/tmp/1501035/bin/snapcraft", line 33, in <module>
    snapcraft.main.main()
  File "/tmp/1501035/snapcraft/main.py", line 80, in main
    args.func(args)
  File "/tmp/1501035/snapcraft/cmds.py", line 331, in cmd
    if not getattr(part, cmd)(force=force):
  File "/tmp/1501035/snapcraft/plugin.py", line 196, in pull
    if not getattr(self.code, 'pull')():
  File "/tmp/1501035/snapcraft/plugins/python3_project.py", line 44, in pull
    return self._pip()
  File "/tmp/1501035/snapcraft/plugins/python3_project.py", line 61, in _pip
    prefix, 'lib', self.python_version, 'site-packages')
  File "/tmp/1501035/snapcraft/plugins/python3_project.py", line 106, in python_version
    return self.run_output(['py3versions', '-i'])
  File "/tmp/1501035/snapcraft/__init__.py", line 82, in run_output
    return snapcraft.common.run_output(cmd, cwd=cwd, **kwargs)
  File "/tmp/1501035/snapcraft/common.py", line 60, in run_output
    return subprocess.check_output(['/bin/sh', f.name] + cmd, **kwargs).decode('utf8').strip()
  File "/usr/lib/python3.4/subprocess.py", line 620, in check_output
    raise CalledProcessError(retcode, process.args, output=output)
subprocess.CalledProcessError: Command '['/bin/sh', '/tmp/tmpf3o705f8', 'py3versions', '-i']' returned non-zero exit status 2