Created temporary directory: /tmp/pip-ephem-wheel-cache-cum90m6b
Created temporary directory: /tmp/pip-req-tracker-ijpx8qm6
Created requirements tracker '/tmp/pip-req-tracker-ijpx8qm6'
Created temporary directory: /tmp/pip-wheel-72x0rli2
Looking in indexes: https://pypi.python.org/simple
Collecting zope.keyreference==4.2.0
  1 location(s) to search for versions of zope.keyreference:
  * https://pypi.python.org/simple/zope-keyreference/
  Getting page https://pypi.python.org/simple/zope-keyreference/
  Analyzing links from page https://pypi.org/simple/zope-keyreference/
    Found link https://files.pythonhosted.org/packages/6f/ab/e1bb93f789f52fb20af65122c6612a980572fe8393e314da55b39b81c9d7/zope.keyreference-3.6.0.tar.gz#sha256=67a06e55aac2d56a3f10564c916241612cff6e21a6d4ddba2d8970c539e919aa (from https://pypi.org/simple/zope-keyreference/), version: 3.6.0
    Found link https://files.pythonhosted.org/packages/09/66/f605e8996b6d491e787761a8fca96fa3dd814f8820fc5951a7468785d60f/zope.keyreference-3.6.1.tar.gz#sha256=425ab325a007256d76944b75b672d4251c5b5b0816b1902070aea3b1e76a5f58 (from https://pypi.org/simple/zope-keyreference/), version: 3.6.1
    Found link https://files.pythonhosted.org/packages/c8/99/cb0f648c56d6f302366e74b4c8757a1a8f70eef6d5e2c65ec89141ba4f89/zope.keyreference-3.6.2.zip#sha256=f9a4b8f360993844259a0b1a0e77e05bc64ac18045c3ae020e80dd64a8ad796f (from https://pypi.org/simple/zope-keyreference/), version: 3.6.2
    Found link https://files.pythonhosted.org/packages/35/0f/ccf19fe4ece8c75e5974486bcd6dc7381ad6b9991cea7c49b4ac5e35dded/zope.keyreference-3.6.3.tar.gz#sha256=ced167802d6807be5f415e8ee27ab6fe3338d3293b4cc5e0b653ee5cf017f468 (from https://pypi.org/simple/zope-keyreference/), version: 3.6.3
    Found link https://files.pythonhosted.org/packages/7b/1a/ca9335023253a369cfd3334dfaa43e96e57f1c065d5c4d429f1baa1a830d/zope.keyreference-3.6.4.tar.gz#sha256=8cd20b29e3e9ff5ab78212470d87585358c14f08cdfbd153cfb50bbeba8335fc (from https://pypi.org/simple/zope-keyreference/), version: 3.6.4
    Found link https://files.pythonhosted.org/packages/80/f8/e1fa1268f4d3055e6f28a429e02e9c2f6f8e2e3d732e68c4272a1b19d09a/zope.keyreference-4.0.0a1.zip#sha256=ed2c95f47516951272aadcd31b7008f0e59224c82cf25bea0cf2d3379742131d (from https://pypi.org/simple/zope-keyreference/), version: 4.0.0a1
    Found link https://files.pythonhosted.org/packages/a2/44/3bcc7cdadb09dde251285109aa53df7b3044511c080b3cd2fb92f8076e3c/zope.keyreference-4.0.0a2.zip#sha256=2d42381eb985ddbad853e15caa2f5142430018407aa94f5e5d0389c5138532ef (from https://pypi.org/simple/zope-keyreference/), version: 4.0.0a2
    Found link https://files.pythonhosted.org/packages/10/01/e0a19779b50e4acad1090e1143ab23fe37b1d674deebee809cd009263379/zope.keyreference-4.0.0.tar.gz#sha256=b21fea2a019ff5f62dcb621011ab23bfc857528faca8fa6a9fb819e8ccb94f72 (from https://pypi.org/simple/zope-keyreference/), version: 4.0.0
    Found link https://files.pythonhosted.org/packages/27/be/44b701c20fda905cd2fd638c97df33154873bf3548f630db1f5afd64ae4f/zope.keyreference-4.1.0.tar.gz#sha256=e697a29a81886e5f1f584084da54d34f04a9fd5155e031cf0de7979ac2495bcf (from https://pypi.org/simple/zope-keyreference/), version: 4.1.0
    Found link https://files.pythonhosted.org/packages/89/02/de44c5761968a935d169c3c839d1f4bdd566075a4370ed22360f61490e3e/zope.keyreference-4.2.0-py2.py3-none-any.whl#sha256=2beae7bafe4c2d400ad0f5a030da59f27434a545cd21c1ddf9d31ba00889e46c (from https://pypi.org/simple/zope-keyreference/), version: 4.2.0
    Found link https://files.pythonhosted.org/packages/9f/da/4842ad379272e7213255ef73767b5fd45610a2171d05d6e1eef50ecc06a9/zope.keyreference-4.2.0-py3-none-any.whl#sha256=35975f444e6e24a6d4eea0b4ae95479387564085759c186813def633f1fa7688 (from https://pypi.org/simple/zope-keyreference/), version: 4.2.0
    Found link https://files.pythonhosted.org/packages/43/c2/ef8c352191f086a30b4769918f2984d12c8b6d75a2b9b170ee8ad667ace6/zope.keyreference-4.2.0.tar.gz#sha256=0c5835aeea5b0c918d7e3be8c45c28ef6ac6f72ba7d08645571d33065c45bedf (from https://pypi.org/simple/zope-keyreference/), version: 4.2.0
  Using version 4.2.0 (newest of versions: 4.2.0)
  Created temporary directory: /tmp/pip-unpack-5vfrc2wr
  Downloading https://files.pythonhosted.org/packages/89/02/de44c5761968a935d169c3c839d1f4bdd566075a4370ed22360f61490e3e/zope.keyreference-4.2.0-py2.py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/89/02/de44c5761968a935d169c3c839d1f4bdd566075a4370ed22360f61490e3e/zope.keyreference-4.2.0-py2.py3-none-any.whl#sha256=2beae7bafe4c2d400ad0f5a030da59f27434a545cd21c1ddf9d31ba00889e46c (from https://pypi.org/simple/zope-keyreference/)
  Saved /tmp/tmp3v3g5icz/zope.keyreference-4.2.0-py2.py3-none-any.whl
  Added zope.keyreference==4.2.0 from https://files.pythonhosted.org/packages/89/02/de44c5761968a935d169c3c839d1f4bdd566075a4370ed22360f61490e3e/zope.keyreference-4.2.0-py2.py3-none-any.whl#sha256=2beae7bafe4c2d400ad0f5a030da59f27434a545cd21c1ddf9d31ba00889e46c to build tracker '/tmp/pip-req-tracker-ijpx8qm6'
  Removed zope.keyreference==4.2.0 from https://files.pythonhosted.org/packages/89/02/de44c5761968a935d169c3c839d1f4bdd566075a4370ed22360f61490e3e/zope.keyreference-4.2.0-py2.py3-none-any.whl#sha256=2beae7bafe4c2d400ad0f5a030da59f27434a545cd21c1ddf9d31ba00889e46c from build tracker '/tmp/pip-req-tracker-ijpx8qm6'
Skipping zope.keyreference, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-72x0rli2/zope.keyreference
Removed build tracker '/tmp/pip-req-tracker-ijpx8qm6'