Collecting nifgen==0.4.0
  1 location(s) to search for versions of nifgen:
  * https://pypi.python.org/simple/nifgen/
  Getting page https://pypi.python.org/simple/nifgen/
  Analyzing links from page https://pypi.python.org/simple/nifgen/
    Found link https://pypi.python.org/packages/1f/8d/61ec4b8d69d62bb283f3692147271a1a32e10c7b8028f630e3892ea5b364/nifgen-0.4.0.tar.gz#md5=78ecdad27c1c0430a4e3eb764569bfc2 (from https://pypi.python.org/simple/nifgen/), version: 0.4.0
    Found link https://pypi.python.org/packages/37/dd/0c2d03efc53e4359b7120119346bae4d1c88e99ac7cb596baabbe45e94b7/nifgen-0.4.0.dev0.tar.gz#md5=2e475380addd835b9d23249baaac2963 (from https://pypi.python.org/simple/nifgen/), version: 0.4.0.dev0
    Found link https://pypi.python.org/packages/6e/75/f4a067515e56ce8038f2a7884a417740b39a55ce280db7071e8b2e63add7/nifgen-0.4.0.dev0-py2.py3-none-any.whl#md5=bfd669187d2e9ab2034a810182e98f9a (from https://pypi.python.org/simple/nifgen/), version: 0.4.0.dev0
    Found link https://pypi.python.org/packages/89/a3/e69ab42aa6db79b0102e509aec7ba671084a3bfa7301fbdd7b03dc93dc52/nifgen-0.4.0-py2.py3-none-any.whl#md5=33fe90de616ae977965e2001376cd479 (from https://pypi.python.org/simple/nifgen/), version: 0.4.0
  Using version 0.4.0 (newest of versions: 0.4.0)
  Downloading nifgen-0.4.0-py2.py3-none-any.whl (55kB)
  Downloading from URL https://pypi.python.org/packages/89/a3/e69ab42aa6db79b0102e509aec7ba671084a3bfa7301fbdd7b03dc93dc52/nifgen-0.4.0-py2.py3-none-any.whl#md5=33fe90de616ae977965e2001376cd479 (from https://pypi.python.org/simple/nifgen/)
  Saved /tmp/tmpxte1cm1v/nifgen-0.4.0-py2.py3-none-any.whl
Skipping nifgen, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-e49i8dy0/nifgen