Created temporary directory: /tmp/pip-ephem-wheel-cache-1wa1bdxm
Created temporary directory: /tmp/pip-req-tracker-insi2_1n
Created requirements tracker '/tmp/pip-req-tracker-insi2_1n'
Created temporary directory: /tmp/pip-wheel-wq5xk9ip
Collecting vixen==1.0rc3
  1 location(s) to search for versions of vixen:
  * https://pypi.org/simple/vixen/
  Getting page https://pypi.org/simple/vixen/
  Analyzing links from page https://pypi.org/simple/vixen/
    Skipping link https://files.pythonhosted.org/packages/10/c6/cdf1e249949a0deee2b12b97aa6c5d4c9a814988bdaddc4fa9e4aec205ac/vixen-1.0rc2-py2-none-any.whl#sha256=e5284de9de8b47794ed71d0b43c2550a03f30c492c2073e056bc031b77868828 (from https://pypi.org/simple/vixen/); it is not compatible with this Python
    Found link https://files.pythonhosted.org/packages/a8/2a/c9173c54b1e2f51a0f57f74bb97da58fef3d23118636f72baf62936b5704/vixen-1.0rc2.tar.gz#sha256=8e69ba6cdf5feb517d603c6b753ba52421085aae8f5c07a1def9f078c888dd68 (from https://pypi.org/simple/vixen/), version: 1.0rc2
    Found link https://files.pythonhosted.org/packages/09/64/f2dfcf723cfb2a91d576e7047b5afd277fe08884e550c3fd15c8c2d7af00/vixen-1.0rc3-py3-none-any.whl#sha256=96e56593247f1633a2dca5607a6260cf2e5c9ea50821bbb71e7274046d42fabb (from https://pypi.org/simple/vixen/) (requires-python:<3.7), version: 1.0rc3
    Found link https://files.pythonhosted.org/packages/c2/8e/4e91cac3ec3847e5ccc0d321c3da37280a701b6dc8d1613cd4b535321151/vixen-1.0rc3.tar.gz#sha256=2f1daefffabd0cc31964d49d19fe9b39d2d55cc72b7348fca4a3021ae25885b3 (from https://pypi.org/simple/vixen/) (requires-python:<3.7), version: 1.0rc3
  Using version 1.0rc3 (newest of versions: 1.0rc3)
  Created temporary directory: /tmp/pip-unpack-unkgd8it
  Downloading https://files.pythonhosted.org/packages/09/64/f2dfcf723cfb2a91d576e7047b5afd277fe08884e550c3fd15c8c2d7af00/vixen-1.0rc3-py3-none-any.whl (95kB)
  Downloading from URL https://files.pythonhosted.org/packages/09/64/f2dfcf723cfb2a91d576e7047b5afd277fe08884e550c3fd15c8c2d7af00/vixen-1.0rc3-py3-none-any.whl#sha256=96e56593247f1633a2dca5607a6260cf2e5c9ea50821bbb71e7274046d42fabb (from https://pypi.org/simple/vixen/) (requires-python:<3.7)
  Saved /tmp/tmpjqt4al_l/vixen-1.0rc3-py3-none-any.whl
  Added vixen==1.0rc3 from https://files.pythonhosted.org/packages/09/64/f2dfcf723cfb2a91d576e7047b5afd277fe08884e550c3fd15c8c2d7af00/vixen-1.0rc3-py3-none-any.whl#sha256=96e56593247f1633a2dca5607a6260cf2e5c9ea50821bbb71e7274046d42fabb to build tracker '/tmp/pip-req-tracker-insi2_1n'
  Removed vixen==1.0rc3 from https://files.pythonhosted.org/packages/09/64/f2dfcf723cfb2a91d576e7047b5afd277fe08884e550c3fd15c8c2d7af00/vixen-1.0rc3-py3-none-any.whl#sha256=96e56593247f1633a2dca5607a6260cf2e5c9ea50821bbb71e7274046d42fabb from build tracker '/tmp/pip-req-tracker-insi2_1n'
Skipping vixen, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-wq5xk9ip/vixen
Removed build tracker '/tmp/pip-req-tracker-insi2_1n'