$ tox --recreate  -e py27
py27 create: /home/smoser-public/src/curtin/custom-partitioning-incremental-2/.tox/py27
py27 installdeps: -r/home/smoser-public/src/curtin/custom-partitioning-incremental-2/test-requirements.txt, -r/home/smoser-public/src/curtin/custom-partitioning-incremental-2/requirements.txt
py27 develop-inst: /home/smoser-public/src/curtin/custom-partitioning-incremental-2
Traceback (most recent call last):
  File "/usr/bin/tox", line 9, in <module>
    load_entry_point('tox==2.1.1', 'console_scripts', 'tox')()
  File "/usr/lib/python3/dist-packages/tox/session.py", line 39, in main
    retcode = Session(config).runcommand()
  File "/usr/lib/python3/dist-packages/tox/session.py", line 373, in runcommand
    return self.subcommand_test()
  File "/usr/lib/python3/dist-packages/tox/session.py", line 540, in subcommand_test
    output = py.process.cmdexec("%s freeze" % (pip))
  File "/usr/lib/python3/dist-packages/py/_process/cmdexec.py", line 28, in cmdexec
    raise ExecutionFailed(status, status, cmd, out, err)
py.process.cmdexec.Error: ExecutionFailed: 2  /home/smoser-public/src/curtin/custom-partitioning-incremental-2/.tox/py27/bin/pip freeze
Exception:
Traceback (most recent call last):
  File "/home/smoser-public/src/curtin/custom-partitioning-incremental-2/.tox/py27/local/lib/python2.7/site-packages/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/home/smoser-public/src/curtin/custom-partitioning-incremental-2/.tox/py27/local/lib/python2.7/site-packages/pip/commands/freeze.py", line 74, in run
    req = pip.FrozenRequirement.from_dist(dist, dependency_links, find_tags=find_tags)
  File "/home/smoser-public/src/curtin/custom-partitioning-incremental-2/.tox/py27/local/lib/python2.7/site-packages/pip/__init__.py", line 299, in from_dist
    assert len(specs) == 1 and specs[0][0] == '=='
AssertionError

Storing debug log for failure in /home/smoser/.pip/pip.log