/usr/local/bin/streamlink
Traceback (most recent call last):
  File "/usr/local/bin/streamlink", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2927, in <module>
    @_call_aside
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2913, in _call_aside
    f(*args, **kwargs)
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2940, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 635, in _build_master
    ws.require(__requires__)
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 943, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 837, in resolve
    new_requirements = dist.requires(req.extras)[::-1]
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2497, in requires
    "%s has no such extra feature %r" % (self, ext)
pkg_resources.UnknownExtra: requests 2.9.1 has no such extra feature 'socks'