Created temporary directory: /tmp/pip-ephem-wheel-cache-655n6akv
Created temporary directory: /tmp/pip-req-tracker-m1wu93vu
Created requirements tracker '/tmp/pip-req-tracker-m1wu93vu'
Created temporary directory: /tmp/pip-wheel-1utexbax
Looking in indexes: https://pypi.python.org/simple
Collecting pex==1.4.7
  1 location(s) to search for versions of pex:
  * https://pypi.python.org/simple/pex/
  Getting page https://pypi.python.org/simple/pex/
  Analyzing links from page https://pypi.org/simple/pex/
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    Found link https://files.pythonhosted.org/packages/5b/00/deb57cb41deded846d96443498d0b13419e2b75e6a81bef09aa071d77702/pex-1.4.1-py2.py3-none-any.whl#sha256=f3cd53dd50bf4346d7483f2e980d00c87e9c0610a81a0ce27f93def3da3ae9ae (from https://pypi.org/simple/pex/), version: 1.4.1
    Found link https://files.pythonhosted.org/packages/6c/02/2505677805383926aad837fb70c4da575ac3f6c651aca586826a0b00b3bf/pex-1.4.1.tar.gz#sha256=1e198f01afa08ea40df201620881044f8232b6ace8eff3ea08500546243e01af (from https://pypi.org/simple/pex/), version: 1.4.1
    Found link https://files.pythonhosted.org/packages/32/93/ce8c0f2568a7571bb4ec3d8769fe82f4cb928058b716812837d9df1b1f07/pex-1.4.2-py2.py3-none-any.whl#sha256=36d37960fdc4d7b8bdc76041959a121fc548549be074b76e3fccc7197c90c265 (from https://pypi.org/simple/pex/), version: 1.4.2
    Found link https://files.pythonhosted.org/packages/89/5d/f1cc8749149d17f90c971d0290be4f3b300245a70ef74f9cfde32c875ee7/pex-1.4.2.tar.gz#sha256=59dd9915960ba1fc8be6d9e4159a6d3cece4c76d153bac428ff3fb0dbeed1d41 (from https://pypi.org/simple/pex/), version: 1.4.2
    Found link https://files.pythonhosted.org/packages/43/78/8a0a0f55e88a1c8de7f14465521c67222fa87f5fa4a958c27cdd3849f2a2/pex-1.4.3-py2.py3-none-any.whl#sha256=de05a38dcc7fcf64cd7c793394498e53ece6deab15811818ad44da7013f96ec5 (from https://pypi.org/simple/pex/), version: 1.4.3
    Found link https://files.pythonhosted.org/packages/74/c0/204dabf5859f1ef3e671158765ecb8c38b274ef442a6021b13478a7db94b/pex-1.4.3.tar.gz#sha256=3796e5654dedf072e04bf3a770a900c276a9f619fad5d2d14354292d49d6882c (from https://pypi.org/simple/pex/), version: 1.4.3
    Found link https://files.pythonhosted.org/packages/cb/f6/7b1ee161f4b3a2293367835b7fbac0057608a8e4398c30f3698c88230272/pex-1.4.4-py2.py3-none-any.whl#sha256=16171a3f27ca93a314f0ca7e995dafb6bd6bb462395bba3276622bb9bdaeffb3 (from https://pypi.org/simple/pex/), version: 1.4.4
    Found link https://files.pythonhosted.org/packages/7a/9a/d0847d061715604c905ac79ad41153b805863cf3573cce93a234ed0e142d/pex-1.4.4.tar.gz#sha256=2e5829ef204de7f3256b9a77628c41618ae3fb48ad651df45cce6770497e35e6 (from https://pypi.org/simple/pex/), version: 1.4.4
    Found link https://files.pythonhosted.org/packages/c1/ab/5870553de6485516c5355cbe690dc1ef5592b4be746707729bbf0fb487c4/pex-1.4.5-py2.py3-none-any.whl#sha256=72d6d914b58b183cc252ece731760b8ffc57257006c102101c730e5a0de673fd (from https://pypi.org/simple/pex/), version: 1.4.5
    Found link https://files.pythonhosted.org/packages/6c/be/a2400ea665e5358179c8d2aa505b0368adbe46a910e2da5756407086ba80/pex-1.4.5.tar.gz#sha256=120e2cf55b84c5e0c95bb2d39d1b05da044ac1ac59e390ead0eed983fac64913 (from https://pypi.org/simple/pex/), version: 1.4.5
    Found link https://files.pythonhosted.org/packages/57/1f/892b5e810df3435fd3ef18f78c9cdffb5df80cb4c5bf2b2bd8a1d3c8b590/pex-1.4.6-py2.py3-none-any.whl#sha256=a999f75fb4c96fb1296ef52f3afd2abc8b241e39ad693439bba0d7bf4c07e395 (from https://pypi.org/simple/pex/), version: 1.4.6
    Found link https://files.pythonhosted.org/packages/1b/f2/a64cde094ce5c22c69c778ea9f93617da1a651cb29e5baf931daff45b105/pex-1.4.6.tar.gz#sha256=b82c687b7f9099c6d76bc2bc5707c60e38bd741efa434846eac8c70e4f89ed29 (from https://pypi.org/simple/pex/), version: 1.4.6
    Found link https://files.pythonhosted.org/packages/71/15/69a472f883add4b4d2d6adf09184cbad142abc7273184fb56fc7f864391b/pex-1.4.7-py2.py3-none-any.whl#sha256=f3926b1f8e9d282f261b293a61141a2f7eea0fa3c59735ef426fd2c9480bedda (from https://pypi.org/simple/pex/), version: 1.4.7
    Found link https://files.pythonhosted.org/packages/77/be/63ae3b3820a14cd06225a0b1e9d341a6db321f4d6ce5e0dd99afc6499b9c/pex-1.4.7.tar.gz#sha256=9dafc9e26dcc2ba2d95def9820cbad1abed5fb6026cb6e174b1459b00f3d373a (from https://pypi.org/simple/pex/), version: 1.4.7
  Using version 1.4.7 (newest of versions: 1.4.7)
  Created temporary directory: /tmp/pip-unpack-plqqqb5u
  Downloading https://files.pythonhosted.org/packages/71/15/69a472f883add4b4d2d6adf09184cbad142abc7273184fb56fc7f864391b/pex-1.4.7-py2.py3-none-any.whl (115kB)
  Downloading from URL https://files.pythonhosted.org/packages/71/15/69a472f883add4b4d2d6adf09184cbad142abc7273184fb56fc7f864391b/pex-1.4.7-py2.py3-none-any.whl#sha256=f3926b1f8e9d282f261b293a61141a2f7eea0fa3c59735ef426fd2c9480bedda (from https://pypi.org/simple/pex/)
  Saved /tmp/tmpemt4eua2/pex-1.4.7-py2.py3-none-any.whl
  Added pex==1.4.7 from https://files.pythonhosted.org/packages/71/15/69a472f883add4b4d2d6adf09184cbad142abc7273184fb56fc7f864391b/pex-1.4.7-py2.py3-none-any.whl#sha256=f3926b1f8e9d282f261b293a61141a2f7eea0fa3c59735ef426fd2c9480bedda to build tracker '/tmp/pip-req-tracker-m1wu93vu'
  Removed pex==1.4.7 from https://files.pythonhosted.org/packages/71/15/69a472f883add4b4d2d6adf09184cbad142abc7273184fb56fc7f864391b/pex-1.4.7-py2.py3-none-any.whl#sha256=f3926b1f8e9d282f261b293a61141a2f7eea0fa3c59735ef426fd2c9480bedda from build tracker '/tmp/pip-req-tracker-m1wu93vu'
Skipping pex, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-1utexbax/pex
Removed build tracker '/tmp/pip-req-tracker-m1wu93vu'