Created temporary directory: /tmp/pip-ephem-wheel-cache-vu7cexsq
Created temporary directory: /tmp/pip-req-tracker-ut7pdzux
Created requirements tracker '/tmp/pip-req-tracker-ut7pdzux'
Created temporary directory: /tmp/pip-wheel-igs38v8_
Looking in indexes: https://pypi.python.org/simple
Collecting ballet==0.4.0
  1 location(s) to search for versions of ballet:
  * https://pypi.python.org/simple/ballet/
  Getting page https://pypi.python.org/simple/ballet/
  Analyzing links from page https://pypi.org/simple/ballet/
    Found link https://files.pythonhosted.org/packages/b9/89/76ff0d3a7a235cd1cb778e079be8a30cdab0bc08b6c958e049eebdf1639e/ballet-0.4.0-py2.py3-none-any.whl#sha256=1c502196d8a883149b21a43545ebaf19480848d1cd5153a29da38f5ba3eec658 (from https://pypi.org/simple/ballet/) (requires-python:>=3.4), version: 0.4.0
    Found link https://files.pythonhosted.org/packages/c2/b0/a2cc4a6da42b4bf7916e690ae860533e026b88d5c6e1b39038997586a6ad/ballet-0.4.0.tar.gz#sha256=3631d1a7191a2015ab2cb9a5499db4d3f12b6fefae6f17c10c049bcb3c5a3287 (from https://pypi.org/simple/ballet/) (requires-python:>=3.4), version: 0.4.0
  Using version 0.4.0 (newest of versions: 0.4.0)
  Created temporary directory: /tmp/pip-unpack-8nwjib54
  Downloading https://files.pythonhosted.org/packages/b9/89/76ff0d3a7a235cd1cb778e079be8a30cdab0bc08b6c958e049eebdf1639e/ballet-0.4.0-py2.py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/b9/89/76ff0d3a7a235cd1cb778e079be8a30cdab0bc08b6c958e049eebdf1639e/ballet-0.4.0-py2.py3-none-any.whl#sha256=1c502196d8a883149b21a43545ebaf19480848d1cd5153a29da38f5ba3eec658 (from https://pypi.org/simple/ballet/) (requires-python:>=3.4)
  Saved /tmp/tmppqsciilr/ballet-0.4.0-py2.py3-none-any.whl
  Added ballet==0.4.0 from https://files.pythonhosted.org/packages/b9/89/76ff0d3a7a235cd1cb778e079be8a30cdab0bc08b6c958e049eebdf1639e/ballet-0.4.0-py2.py3-none-any.whl#sha256=1c502196d8a883149b21a43545ebaf19480848d1cd5153a29da38f5ba3eec658 to build tracker '/tmp/pip-req-tracker-ut7pdzux'
  Removed ballet==0.4.0 from https://files.pythonhosted.org/packages/b9/89/76ff0d3a7a235cd1cb778e079be8a30cdab0bc08b6c958e049eebdf1639e/ballet-0.4.0-py2.py3-none-any.whl#sha256=1c502196d8a883149b21a43545ebaf19480848d1cd5153a29da38f5ba3eec658 from build tracker '/tmp/pip-req-tracker-ut7pdzux'
Skipping ballet, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-igs38v8_/ballet
Removed build tracker '/tmp/pip-req-tracker-ut7pdzux'