11:49:30 Traceback (most recent call last):
11:49:30   File "/usr/bin/isort", line 6, in <module>
11:49:30     from pkg_resources import load_entry_point
11:49:30   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3095, in <module>
11:49:30     @_call_aside
11:49:30   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3079, in _call_aside
11:49:30     f(*args, **kwargs)
11:49:30   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3108, in _initialize_master_working_set
11:49:30     working_set = WorkingSet._build_master()
11:49:30   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 570, in _build_master
11:49:30     ws.require(__requires__)
11:49:30   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 888, in require
11:49:30     needed = self.resolve(parse_requirements(requirements))
11:49:30   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 774, in resolve
11:49:30     raise DistributionNotFound(req, requirers)
11:49:30 pkg_resources.DistributionNotFound: The 'futures' distribution was not found and is required by isort
11:49:30 + exit 1
11:49:30 make: *** [Makefile:342: validations] Error 1