Collecting rfc3161ng==2.0.4
  1 location(s) to search for versions of rfc3161ng:
  * https://pypi.python.org/simple/rfc3161ng/
  Getting page https://pypi.python.org/simple/rfc3161ng/
  Analyzing links from page https://pypi.python.org/simple/rfc3161ng/
    Found link https://pypi.python.org/packages/0d/26/af96362c137fde60a773503be5ff51bf925315f939b0279f7ed21541667b/rfc3161ng-2.0.1.tar.gz#md5=872c63edc89cd7204d177fe06e7fcb45 (from https://pypi.python.org/simple/rfc3161ng/), version: 2.0.1
    Skipping link https://pypi.python.org/packages/27/d9/d1f9c7abd5a185a667fe5b1cff7e250b93f144f9f538541ac238486bd89f/rfc3161ng-2.0.2-py2-none-any.whl#md5=0c39b9671b49e5a0b0d9d73160782691 (from https://pypi.python.org/simple/rfc3161ng/); it is not compatible with this Python
    Found link https://pypi.python.org/packages/2d/90/d265a5c66f6ef4c3e55b7c59829a0c6215b8b0281698c5ba1ee041edb901/rfc3161ng-2.0.3.tar.gz#md5=55e0a99ac4fb3c171bab2916ea75dcdc (from https://pypi.python.org/simple/rfc3161ng/), version: 2.0.3
    Found link https://pypi.python.org/packages/31/9c/91fce4fd891d94b213036b90a937ced59c56596f27857b4833baeb30f4bf/rfc3161ng-2.0.4-py2.py3-none-any.whl#md5=46bda9c7daf7d9e4d4d716a0b66681e9 (from https://pypi.python.org/simple/rfc3161ng/), version: 2.0.4
    Found link https://pypi.python.org/packages/3a/a9/2eac2f042e886516b57f3cff9e66afc7388f4f8e07292418bb26ea41ee06/rfc3161ng-2.0.3-py2.py3-none-any.whl#md5=fe90a73d375d5c4e2affa5f69582e19e (from https://pypi.python.org/simple/rfc3161ng/), version: 2.0.3
    Found link https://pypi.python.org/packages/4c/1c/5c02ebe3b747e88ab4ec73b3ff2e95dba557d5e19d428e3ae6710f4cc9ab/rfc3161ng-2.0.2.tar.gz#md5=f7fe2c386d11610b6ecdb4d098add4e8 (from https://pypi.python.org/simple/rfc3161ng/), version: 2.0.2
    Found link https://pypi.python.org/packages/57/ad/d24a6d180b321afb90fe04b738062a57b582e3bb5f38ea9c32d9da5e71ae/rfc3161ng-2.0.4.tar.gz#md5=c0c22a7763c6a21a0e3bac5803cdc909 (from https://pypi.python.org/simple/rfc3161ng/), version: 2.0.4
    Skipping link https://pypi.python.org/packages/85/5d/654c79a9a8f56bb525e77a15367ac7698b762780cfefc82a42a92ea69680/rfc3161ng-2.0.1-py2-none-any.whl#md5=e8c0b91db27fe4a589abef310a67ffe6 (from https://pypi.python.org/simple/rfc3161ng/); it is not compatible with this Python
  Using version 2.0.4 (newest of versions: 2.0.4)
  Downloading rfc3161ng-2.0.4-py2.py3-none-any.whl
  Downloading from URL https://pypi.python.org/packages/31/9c/91fce4fd891d94b213036b90a937ced59c56596f27857b4833baeb30f4bf/rfc3161ng-2.0.4-py2.py3-none-any.whl#md5=46bda9c7daf7d9e4d4d716a0b66681e9 (from https://pypi.python.org/simple/rfc3161ng/)
  Saved /tmp/tmp70vw2wkv/rfc3161ng-2.0.4-py2.py3-none-any.whl
Skipping rfc3161ng, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-v7qucdi8/rfc3161ng