Collecting bison==0.0.4
  1 location(s) to search for versions of bison:
  * https://pypi.python.org/simple/bison/
  Getting page https://pypi.python.org/simple/bison/
  Analyzing links from page https://pypi.python.org/simple/bison/
    Found link https://pypi.python.org/packages/3f/c2/c46b550c022c09e7d15b4d37a2df0c0447b57cf8fcddc65e9819e4bfe14e/bison-0.0.2-py2.py3-none-any.whl#md5=bb15f5a9932b990d6dc4e142bd82b7a6 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.2
    Found link https://pypi.python.org/packages/4c/2b/be4601218f6c5e968da2580c0ece23fead89781ccaec938017e11699e19b/bison-0.0.1.tar.gz#md5=ce4bc1e3c06889101566dcf3620d27a0 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.1
    Found link https://pypi.python.org/packages/76/dc/e2dca597ca2023c8c1a8fc489b5380e5966e90a74b8a1337cb8ce7c08fa3/bison-0.0.4-py2.py3-none-any.whl#md5=00a310984bcf1dec530355998f9e40a9 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.4
    Found link https://pypi.python.org/packages/7d/95/dbe84d3e9740ae547d93546fabc682063d36956840c762fe8ec8ae605074/bison-0.0.3.tar.gz#md5=9b2ef54428443494129de736a5540d4c (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.3
    Found link https://pypi.python.org/packages/80/28/8b964f2a11569b75f2c108eb50d3bf142c67eeb4e2d2e0b0d697331f24c3/bison-0.0.4.tar.gz#md5=583cae63f8c79c76425e02d62801c5a6 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.4
    Found link https://pypi.python.org/packages/d0/59/1665577e705feaa2f0135e0de779cbb0f75b546ca8ddbfbc4960431dc0a0/bison-0.0.1-py2.py3-none-any.whl#md5=7c77e696bd15019fae2a6438f77919f6 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.1
    Found link https://pypi.python.org/packages/f7/9a/4b37eb7296a40467cc07ce75883c2e492fc510f38d9ac8345003dee04216/bison-0.0.2.tar.gz#md5=522ed7ff0a90bac9522ae53f5f757d9d (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.2
    Found link https://pypi.python.org/packages/ff/57/87ca4488fb5f3babeb90db6404b1f0c372c08c720bf0d6b401af964fd90f/bison-0.0.3-py2.py3-none-any.whl#md5=3bc0b374cda44cb0bdde57c434800975 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.3
  Using version 0.0.4 (newest of versions: 0.0.4)
  Downloading bison-0.0.4-py2.py3-none-any.whl
  Downloading from URL https://pypi.python.org/packages/76/dc/e2dca597ca2023c8c1a8fc489b5380e5966e90a74b8a1337cb8ce7c08fa3/bison-0.0.4-py2.py3-none-any.whl#md5=00a310984bcf1dec530355998f9e40a9 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4)
  Saved /tmp/tmp_ryq5q0y/bison-0.0.4-py2.py3-none-any.whl
Skipping bison, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-dn4yxxsj/bison