txt

sudo pip install virtualenvwrapper
Enter PIN for 'Certificate For PIV Authentication (Yubico PIV Authentication)':
The directory '/Users/dustinlacewell/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/Users/dustinlacewell/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting virtualenvwrapper
  Downloading https://files.pythonhosted.org/packages/2b/8c/3192e10913ad945c0f0fcb17e9b2679434a28ad58ee31ce0104cba3b1154/virtualenvwrapper-4.8.2-py2.py3-none-any.whl
Requirement already satisfied: virtualenv in /nix/store/836im85gwpjj7bj2clxngwhvppf4x7rq-python-2.7.14-env/lib/python2.7/site-packages (from virtualenvwrapper)
Collecting virtualenv-clone (from virtualenvwrapper)
  Downloading https://files.pythonhosted.org/packages/6d/c2/dccb5ccf599e0c5d1eea6acbd058af7a71384f9740179db67a9182a24798/virtualenv_clone-0.3.0-py2.py3-none-any.whl
Collecting stevedore (from virtualenvwrapper)
  Downloading https://files.pythonhosted.org/packages/17/6b/3b7d6d08b2ab3e5ef09e01c9f7b3b590ee135f289bb94553419e40922c25/stevedore-1.28.0-py2.py3-none-any.whl
Requirement already satisfied: six>=1.10.0 in /nix/store/836im85gwpjj7bj2clxngwhvppf4x7rq-python-2.7.14-env/lib/python2.7/site-packages (from stevedore->virtualenvwrapper)
Exception:
Traceback (most recent call last):
  File "/nix/store/836im85gwpjj7bj2clxngwhvppf4x7rq-python-2.7.14-env/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/nix/store/836im85gwpjj7bj2clxngwhvppf4x7rq-python-2.7.14-env/lib/python2.7/site-packages/pip/commands/install.py", line 324, in run
    requirement_set.prepare_files(finder)
  File "/nix/store/836im85gwpjj7bj2clxngwhvppf4x7rq-python-2.7.14-env/lib/python2.7/site-packages/pip/req/req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/nix/store/836im85gwpjj7bj2clxngwhvppf4x7rq-python-2.7.14-env/lib/python2.7/site-packages/pip/req/req_set.py", line 666, in _prepare_file
    check_dist_requires_python(dist)
  File "/nix/store/836im85gwpjj7bj2clxngwhvppf4x7rq-python-2.7.14-env/lib/python2.7/site-packages/pip/utils/packaging.py", line 48, in check_dist_requires_python
    feed_parser.feed(metadata)
  File "/nix/store/836im85gwpjj7bj2clxngwhvppf4x7rq-python-2.7.14-env/lib/python2.7/email/feedparser.py", line 177, in feed
    self._input.push(data)
  File "/nix/store/836im85gwpjj7bj2clxngwhvppf4x7rq-python-2.7.14-env/lib/python2.7/email/feedparser.py", line 99, in push
    parts = data.splitlines(True)
AttributeError: 'NoneType' object has no attribute 'splitlines'
You are using pip version 9.0.1, however version 10.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.