Collecting nstack==0.2.1
  1 location(s) to search for versions of nstack:
  * https://pypi.python.org/simple/nstack/
  Getting page https://pypi.python.org/simple/nstack/
  Analyzing links from page https://pypi.org/simple/nstack/
    Found link https://files.pythonhosted.org/packages/ee/a5/681e579db8720677fd87fac0ec85992bee912bf0e19986e346bc5b3c22d4/nstack-0.1.tar.gz#sha256=d8b2fb244c18e9298fba7d8fa343028e0e397c648b622e1bb433edc10344c131 (from https://pypi.org/simple/nstack/), version: 0.1
    Found link https://files.pythonhosted.org/packages/93/8f/57007204915cf95cee831d5cd102ca262975977b411d8411b8757219820f/nstack-0.2-py2.py3-none-any.whl#sha256=c25755227e7ba8452c5f6c0a313b29b9f2a17efa9438469f0c8fb91767fd0e27 (from https://pypi.org/simple/nstack/), version: 0.2
    Found link https://files.pythonhosted.org/packages/1a/7d/e23ff3693d9bb6c9962c1bfa850334b2c898be41781eb34a6cea232839d9/nstack-0.2.tar.gz#sha256=7d105bb0d2099d141a69e6024db1ee8bd717ae323f8230caa74704132b2e18ed (from https://pypi.org/simple/nstack/), version: 0.2
    Found link https://files.pythonhosted.org/packages/36/06/e7e1f0092758da5e5adb9f96c471c3ee17670d82499424222e669ce59332/nstack-0.2.1-py3-none-any.whl#sha256=c648ecbb9c221c3d863e6dd450622d88a60c1bebb8bba03471f65e137909269b (from https://pypi.org/simple/nstack/), version: 0.2.1
    Found link https://files.pythonhosted.org/packages/f3/e9/0075006e01de08dfb86c01a76a2116a4b88b54de0b48e7fe46f5336c82bb/nstack-0.2.1.tar.gz#sha256=c937c78809852e629d7e93a221f4f820169d4a04087f3b5aea6bf1f7155cb825 (from https://pypi.org/simple/nstack/), version: 0.2.1
  Using version 0.2.1 (newest of versions: 0.2.1)
  Downloading https://files.pythonhosted.org/packages/36/06/e7e1f0092758da5e5adb9f96c471c3ee17670d82499424222e669ce59332/nstack-0.2.1-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/36/06/e7e1f0092758da5e5adb9f96c471c3ee17670d82499424222e669ce59332/nstack-0.2.1-py3-none-any.whl#sha256=c648ecbb9c221c3d863e6dd450622d88a60c1bebb8bba03471f65e137909269b (from https://pypi.org/simple/nstack/)
  Saved /tmp/tmpx1w4lad7/nstack-0.2.1-py3-none-any.whl
Skipping nstack, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-uqb4n_6m/nstack