$ matrix -p /path/to/bundle
# this hangs, I Ctrl-C'd it.
$ cat matrix.log
matrix:123:load_suites: Parsing /usr/local/lib/python3.5/dist-packages/matrix/matrix.yaml
asyncio:1148:default_exception_handler: Task exception was never retrieved
future: <Task finished coro=<__call__() done, defined at /usr/local/lib/python3.5/dist-packages/matrix/rules.py:439> exception=FileNotFoundError(2, 'No such file or directory')>
Traceback (most recent call last):
  File "/usr/lib/python3.5/asyncio/tasks.py", line 239, in _step
    result = coro.send(None)
  File "/usr/local/lib/python3.5/dist-packages/matrix/rules.py", line 441, in __call__
    context = self.load_suite()
  File "/usr/local/lib/python3.5/dist-packages/matrix/rules.py", line 162, in load_suite
    tests = load_suites(filenames)
  File "/usr/local/lib/python3.5/dist-packages/matrix/rules.py", line 124, in load_suites
    with open(filename) as fp:
FileNotFoundError: [Errno 2] No such file or directory: '/usr/local/lib/python3.5/dist-packages/matrix/matrix.yaml'