Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-install-i1hxw5f7/warrant-ext/setup.py", line 4, in <module>
from pip.req import parse_requirements
ImportError: No module named 'pip.req'
Fixes https://github.com/capless/warrant/issues/96