While trying to build a new Octopi image on Rasbian I get the following ouput.

Collecting pyasn1
Downloading pyasn1-0.1.9-py2.py3-none-any.whl
Requirement already satisfied: PyOpenSSL in ./oprint/lib/python2.7/site-packages (from ndg-httpsclient)
Exception:
Traceback (most recent call last):
File "/home/pi/oprint/local/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
status = self.run(options, args)
File "/home/pi/oprint/local/lib/python2.7/site-packages/pip/commands/install.py", line 324, in run
requirement_set.prepare_files(finder)
File "/home/pi/oprint/local/lib/python2.7/site-packages/pip/req/req_set.py", line 380, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File "/home/pi/oprint/local/lib/python2.7/site-packages/pip/req/req_set.py", line 666, in _prepare_file
check_dist_requires_python(dist)
File "/home/pi/oprint/local/lib/python2.7/site-packages/pip/utils/packaging.py", line 48, in check_dist_requires_python
feed_parser.feed(metadata)
File "/usr/lib/python2.7/email/feedparser.py", line 177, in feed
self._input.push(data)
File "/usr/lib/python2.7/email/feedparser.py", line 99, in push
parts = data.splitlines(True)
AttributeError: 'NoneType' object has no attribute 'splitlines'

The version I am building off of is
Linux Rasbian 4.4.32-v7+ #924 SMP Tue Nov 15 18:11:28 GMT 2016 armv7l GNU/Linux