Collecting nav==2.1.0
  1 location(s) to search for versions of nav:
  * https://pypi.python.org/simple/nav/
  Getting page https://pypi.python.org/simple/nav/
  Analyzing links from page https://pypi.python.org/simple/nav/
    Found link https://pypi.python.org/packages/35/8e/c3a7123adbcc886ccfd5b82e07696b3386f9b7b25deb9e0a74c9e77abc26/nav-2.1.0-py2.py3-none-any.whl#md5=3a238c5f9cef027abb520a3786ebbb78 (from https://pypi.python.org/simple/nav/), version: 2.1.0
    Found link https://pypi.python.org/packages/5f/66/d70332a7e2b8a5629d51638b4f7c00b02896245851732e2d75fb67f4723d/nav-2.0.0-py2.py3-none-any.whl#md5=bf8e4d451780a1bb4a0adfd796fd1959 (from https://pypi.python.org/simple/nav/), version: 2.0.0
    Found link https://pypi.python.org/packages/7f/ac/997b95d59f07239463ed2e6959797e56b1e06438cfe5629a2f429fa84dc5/nav-2.0.0.tar.gz#md5=2dd00352f70a0f5a6439e9f94b410ed2 (from https://pypi.python.org/simple/nav/), version: 2.0.0
    Found link https://pypi.python.org/packages/d5/3b/d0d290ccdc4651786c1709d8bc6977d01f79175ef794fd5f5254fd599fe5/nav-2.1.0.tar.gz#md5=33de384dca1dfb8ec5484c0af6bf80b8 (from https://pypi.python.org/simple/nav/), version: 2.1.0
  Using version 2.1.0 (newest of versions: 2.1.0)
  Downloading nav-2.1.0-py2.py3-none-any.whl
  Downloading from URL https://pypi.python.org/packages/35/8e/c3a7123adbcc886ccfd5b82e07696b3386f9b7b25deb9e0a74c9e77abc26/nav-2.1.0-py2.py3-none-any.whl#md5=3a238c5f9cef027abb520a3786ebbb78 (from https://pypi.python.org/simple/nav/)
  Saved /tmp/tmpc5uk_oi_/nav-2.1.0-py2.py3-none-any.whl
Skipping nav, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-cnqyrdq_/nav