Created temporary directory: /tmp/pip-ephem-wheel-cache-ojcjwqko
Created temporary directory: /tmp/pip-req-tracker-r1rdnfyf
Created requirements tracker '/tmp/pip-req-tracker-r1rdnfyf'
Created temporary directory: /tmp/pip-wheel-rzdxutjq
Looking in indexes: https://pypi.python.org/simple
Collecting pybtex==0.22.0
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  Getting page https://pypi.python.org/simple/pybtex/
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  Downloading https://files.pythonhosted.org/packages/f9/3e/ae3dd1039209307ba93b838ce3d36c0a2c1185c9ef04d65cf5727df15486/pybtex-0.22.0-py2.py3-none-any.whl (279kB)
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Skipping pybtex, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-rzdxutjq/pybtex
Removed build tracker '/tmp/pip-req-tracker-r1rdnfyf'