Created temporary directory: /tmp/pip-ephem-wheel-cache-a6o8ecxo
Created temporary directory: /tmp/pip-req-tracker-886xr7bd
Created requirements tracker '/tmp/pip-req-tracker-886xr7bd'
Created temporary directory: /tmp/pip-wheel-fgvq8fbn
Collecting napkin==0.5.1
  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
    Skipping link https://files.pythonhosted.org/packages/25/e7/78ffb7edcf1f856bc9ec3d31e75a15363d688e10f7e293aa4721462fa5c4/napkin-0.5.1-py2-none-any.whl#sha256=1c8cce637cc904c924d0b4adcade70ce3127fe0991883931e521e7707608b9e7 (from https://pypi.org/simple/napkin/); it is not compatible with this Python
    Found link https://files.pythonhosted.org/packages/98/21/81f00d5864d28e1af80bfa8b588bfa7bf3e27bd10f27570f9e325859bbb4/napkin-0.5.1-py3-none-any.whl#sha256=fcbaf3bbefe2237cf04671da8d5bb54b2f9e87268016074656a1bc23641fba9a (from https://pypi.org/simple/napkin/), version: 0.5.1
    Found link https://files.pythonhosted.org/packages/28/86/5c095f96b2623149350fea6b7cf46818a0bf782cf948cd2c70c97de5e780/napkin-0.5.1.tar.gz#sha256=6e49896ca6aec5ad25cafd8823a8369d21d7fb4464158b704dd000e80dc49862 (from https://pypi.org/simple/napkin/), version: 0.5.1
  Using version 0.5.1 (newest of versions: 0.5.1)
  Created temporary directory: /tmp/pip-unpack-4p10e9lo
  Downloading https://files.pythonhosted.org/packages/98/21/81f00d5864d28e1af80bfa8b588bfa7bf3e27bd10f27570f9e325859bbb4/napkin-0.5.1-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/98/21/81f00d5864d28e1af80bfa8b588bfa7bf3e27bd10f27570f9e325859bbb4/napkin-0.5.1-py3-none-any.whl#sha256=fcbaf3bbefe2237cf04671da8d5bb54b2f9e87268016074656a1bc23641fba9a (from https://pypi.org/simple/napkin/)
  Saved /tmp/tmpexgwxbyy/napkin-0.5.1-py3-none-any.whl
  Added napkin==0.5.1 from https://files.pythonhosted.org/packages/98/21/81f00d5864d28e1af80bfa8b588bfa7bf3e27bd10f27570f9e325859bbb4/napkin-0.5.1-py3-none-any.whl#sha256=fcbaf3bbefe2237cf04671da8d5bb54b2f9e87268016074656a1bc23641fba9a to build tracker '/tmp/pip-req-tracker-886xr7bd'
  Removed napkin==0.5.1 from https://files.pythonhosted.org/packages/98/21/81f00d5864d28e1af80bfa8b588bfa7bf3e27bd10f27570f9e325859bbb4/napkin-0.5.1-py3-none-any.whl#sha256=fcbaf3bbefe2237cf04671da8d5bb54b2f9e87268016074656a1bc23641fba9a from build tracker '/tmp/pip-req-tracker-886xr7bd'
Skipping napkin, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-fgvq8fbn/napkin
Removed build tracker '/tmp/pip-req-tracker-886xr7bd'