12:12:36 Traceback (most recent call last):
12:12:36   File "/usr/bin/isort", line 6, in <module>
12:12:36     from pkg_resources import load_entry_point
12:12:36   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3095, in <module>
12:12:36     @_call_aside
12:12:36   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3079, in _call_aside
12:12:36     f(*args, **kwargs)
12:12:36   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3108, in _initialize_master_working_set
12:12:36     working_set = WorkingSet._build_master()
12:12:36   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 570, in _build_master
12:12:36     ws.require(__requires__)
12:12:36   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 888, in require
12:12:36     needed = self.resolve(parse_requirements(requirements))
12:12:36   File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 774, in resolve
12:12:36     raise DistributionNotFound(req, requirers)
12:12:36 pkg_resources.DistributionNotFound: The 'futures' distribution was not found and is required by isort
12:12:36 + echo ERROR: The following check failed:
12:12:36 ERROR: The following check failed:
12:12:36 + echo isort --check build/helptag.py build/helptag_checker.py build/helptag-oneline-check.py packaging/bin/engine-host-update.py packaging/bin/engine-migrate-he.py