Created temporary directory: /tmp/pip-ephem-wheel-cache-z98p6mg9
Created temporary directory: /tmp/pip-req-tracker-8f7ad_z5
Created requirements tracker '/tmp/pip-req-tracker-8f7ad_z5'
Created temporary directory: /tmp/pip-wheel-lvfg4j_s
Looking in indexes: https://pypi.python.org/simple
Collecting buf==1.0.0a6
  1 location(s) to search for versions of buf:
  * https://pypi.python.org/simple/buf/
  Getting page https://pypi.python.org/simple/buf/
  Analyzing links from page https://pypi.org/simple/buf/
    Found link https://files.pythonhosted.org/packages/6a/14/929910618a6c92e6bcefd1ef4caef22b8dcb675ab1f477ad0d5ad423dbf7/buf-1.0.0a6-py2.py3-none-any.whl#sha256=dc52d3249f8d6b7ad687fc177638ae74e0aa2c7a8152b8d3b5671db60f6f4127 (from https://pypi.org/simple/buf/), version: 1.0.0a6
    Found link https://files.pythonhosted.org/packages/b6/76/e86da164c8e9d72d73d2ae131e25e23a24d6fecbff2e4392d1b4bb86a5b0/buf-1.0.0a6.tar.gz#sha256=809167e5d719fcddd44b649d24c217c1de1481ba0f14585bf2fd1d35376c4bd4 (from https://pypi.org/simple/buf/), version: 1.0.0a6
  Using version 1.0.0a6 (newest of versions: 1.0.0a6)
  Created temporary directory: /tmp/pip-unpack-7m1h71ab
  Downloading https://files.pythonhosted.org/packages/6a/14/929910618a6c92e6bcefd1ef4caef22b8dcb675ab1f477ad0d5ad423dbf7/buf-1.0.0a6-py2.py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/6a/14/929910618a6c92e6bcefd1ef4caef22b8dcb675ab1f477ad0d5ad423dbf7/buf-1.0.0a6-py2.py3-none-any.whl#sha256=dc52d3249f8d6b7ad687fc177638ae74e0aa2c7a8152b8d3b5671db60f6f4127 (from https://pypi.org/simple/buf/)
  Saved /tmp/tmp61k01nva/buf-1.0.0a6-py2.py3-none-any.whl
  Added buf==1.0.0a6 from https://files.pythonhosted.org/packages/6a/14/929910618a6c92e6bcefd1ef4caef22b8dcb675ab1f477ad0d5ad423dbf7/buf-1.0.0a6-py2.py3-none-any.whl#sha256=dc52d3249f8d6b7ad687fc177638ae74e0aa2c7a8152b8d3b5671db60f6f4127 to build tracker '/tmp/pip-req-tracker-8f7ad_z5'
  Removed buf==1.0.0a6 from https://files.pythonhosted.org/packages/6a/14/929910618a6c92e6bcefd1ef4caef22b8dcb675ab1f477ad0d5ad423dbf7/buf-1.0.0a6-py2.py3-none-any.whl#sha256=dc52d3249f8d6b7ad687fc177638ae74e0aa2c7a8152b8d3b5671db60f6f4127 from build tracker '/tmp/pip-req-tracker-8f7ad_z5'
Skipping buf, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-lvfg4j_s/buf
Removed build tracker '/tmp/pip-req-tracker-8f7ad_z5'