Created temporary directory: /tmp/pip-ephem-wheel-cache-4boxkgci
Created temporary directory: /tmp/pip-req-tracker-y6vb53oy
Created requirements tracker '/tmp/pip-req-tracker-y6vb53oy'
Created temporary directory: /tmp/pip-wheel-ltprjv02
Collecting napkin==0.5.0
  1 location(s) to search for versions of napkin:
  * https://pypi.org/simple/napkin/
  Getting page https://pypi.org/simple/napkin/
  Analyzing links from page https://pypi.org/simple/napkin/
    Skipping link https://files.pythonhosted.org/packages/09/19/9fe5e1151ee9849d29c36e5ef308c5b202b2e0f72ed7c07999a10fd802aa/napkin-0.5.0-py2-none-any.whl#sha256=afc34296520070b674a2f31790f19e8e6a2eca2a854b008e862f7002f2e4f797 (from https://pypi.org/simple/napkin/); it is not compatible with this Python
    Found link https://files.pythonhosted.org/packages/75/a7/14a8c981e17ffa0abe3df8667141114551ebc56d3f2315bffe3b955ebdb5/napkin-0.5.0-py3-none-any.whl#sha256=273ed63b443b990d073972f4a4085502d87c6147e6c8c31b2032c0fb91305c80 (from https://pypi.org/simple/napkin/), version: 0.5.0
    Found link https://files.pythonhosted.org/packages/c4/81/ff431fd803c1726ea1bbf7cd82009854a213f75b7b2bbb19cdb53da8d0a1/napkin-0.5.0.tar.gz#sha256=7f2dfcbb89dd74c1a09ded8fe7e1fa0e663ce63d1cee83ca61672366e23c5675 (from https://pypi.org/simple/napkin/), version: 0.5.0
  Using version 0.5.0 (newest of versions: 0.5.0)
  Created temporary directory: /tmp/pip-unpack-xekvt7n4
  Downloading https://files.pythonhosted.org/packages/75/a7/14a8c981e17ffa0abe3df8667141114551ebc56d3f2315bffe3b955ebdb5/napkin-0.5.0-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/75/a7/14a8c981e17ffa0abe3df8667141114551ebc56d3f2315bffe3b955ebdb5/napkin-0.5.0-py3-none-any.whl#sha256=273ed63b443b990d073972f4a4085502d87c6147e6c8c31b2032c0fb91305c80 (from https://pypi.org/simple/napkin/)
  Saved /tmp/tmp8joq_3l4/napkin-0.5.0-py3-none-any.whl
  Added napkin==0.5.0 from https://files.pythonhosted.org/packages/75/a7/14a8c981e17ffa0abe3df8667141114551ebc56d3f2315bffe3b955ebdb5/napkin-0.5.0-py3-none-any.whl#sha256=273ed63b443b990d073972f4a4085502d87c6147e6c8c31b2032c0fb91305c80 to build tracker '/tmp/pip-req-tracker-y6vb53oy'
  Removed napkin==0.5.0 from https://files.pythonhosted.org/packages/75/a7/14a8c981e17ffa0abe3df8667141114551ebc56d3f2315bffe3b955ebdb5/napkin-0.5.0-py3-none-any.whl#sha256=273ed63b443b990d073972f4a4085502d87c6147e6c8c31b2032c0fb91305c80 from build tracker '/tmp/pip-req-tracker-y6vb53oy'
Skipping napkin, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-ltprjv02/napkin
Removed build tracker '/tmp/pip-req-tracker-y6vb53oy'