Comment 5 for bug 1658844

Same issue here with our Chef builds.

       ---- Begin output of /usr/bin/pip install cryptography ----
       STDOUT:
       STDERR: Traceback (most recent call last):
         File "/usr/bin/pip", line 5, in <module>
           from pkg_resources import load_entry_point
         File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 70, in <module>
           import packaging.version
       ImportError: No module named packaging.version
       ---- End output of /usr/bin/pip install cryptography ----
       Ran /usr/bin/pip install cryptography returned 1
       [2017-01-25T09:04:40+00:00] FATAL: Chef::Exceptions::ChildConvergeError: Chef run process exited unsuccessfully (exit code 1)