Created temporary directory: /tmp/pip-ephem-wheel-cache-i0kgd2_x
Created temporary directory: /tmp/pip-req-tracker-mnqi8ri_
Created requirements tracker '/tmp/pip-req-tracker-mnqi8ri_'
Created temporary directory: /tmp/pip-wheel-4utyf7um
Looking in indexes: https://pypi.python.org/simple
Collecting buf==1.0.0a10
  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
    Found link https://files.pythonhosted.org/packages/c7/3b/f3354d675a587e49ba2a74e77e2a66ad800433635668e0003e644c6d29ec/buf-1.0.0a7-py3-none-any.whl#sha256=04df4701723c2d239f2d83c7df9ccf64811b719e5451ff0844bd4d5338f8187a (from https://pypi.org/simple/buf/) (requires-python:>=3.5), version: 1.0.0a7
    Found link https://files.pythonhosted.org/packages/8f/51/4770e03dcfe37fecf9e76849fea5a1b25867f24b1be73bf9a1bb53aec89d/buf-1.0.0a7.tar.gz#sha256=395549117edd4e5b3ea56aa6fd76cf8727d9906274189647be3ded6661a46e62 (from https://pypi.org/simple/buf/) (requires-python:>=3.5), version: 1.0.0a7
    Found link https://files.pythonhosted.org/packages/cc/ab/4029d79621e998ced62dfa79a14a42ce85611adf58e1c3df62b800d08fda/buf-1.0.0a8-py3-none-any.whl#sha256=1385f1fee753e4986a1082f951d5d36003b7b86060140de6e220fe47459db832 (from https://pypi.org/simple/buf/) (requires-python:>=3.5), version: 1.0.0a8
    Found link https://files.pythonhosted.org/packages/c6/59/12975dd46e81c7c0cde2e47af7a8e76629aa0acb1ecd3addddc1a64019a5/buf-1.0.0a8.tar.gz#sha256=28e0a0460d9d675c227b07aa08c710a33ecc1591fdc74990d18bf0e014cb663e (from https://pypi.org/simple/buf/) (requires-python:>=3.5), version: 1.0.0a8
    Found link https://files.pythonhosted.org/packages/ad/95/66a9f95a12eeeddee1a3ccaf4fb5817b27ec10559896d97984532cd7700b/buf-1.0.0a9-py3-none-any.whl#sha256=9a72f76484485ee7eed830077170c59867c90d0b77703edd94e53faf4a2db7a5 (from https://pypi.org/simple/buf/) (requires-python:>=3.5), version: 1.0.0a9
    Found link https://files.pythonhosted.org/packages/a4/ac/e6eab3a426bd1d9d43963276fc744b7aeb55560d53f115c5477acf20de03/buf-1.0.0a9.tar.gz#sha256=ceaadb6d804082c2d7a46c7a3a41cfa6478563317d781739fb009de6b225696c (from https://pypi.org/simple/buf/) (requires-python:>=3.5), version: 1.0.0a9
    Found link https://files.pythonhosted.org/packages/dd/7b/46066486ff977d801e24fde5582f92a818383a79695f107c9a7a6eb4cd78/buf-1.0.0a10-py3-none-any.whl#sha256=a72cca712d8b633a385f5215a902e968b9d4afeec7e6c6b3111d6ad8166f8239 (from https://pypi.org/simple/buf/) (requires-python:>=3.5), version: 1.0.0a10
    Found link https://files.pythonhosted.org/packages/fb/4d/fc567ff732d1d99fa915687443c8ef4647ea1090009a17123b43ad5f6733/buf-1.0.0a10.tar.gz#sha256=5fe9cbb9262937fbafd696afdb644a7748dcdaf011fe6dd1a2d7f2967c92693f (from https://pypi.org/simple/buf/) (requires-python:>=3.5), version: 1.0.0a10
  Using version 1.0.0a10 (newest of versions: 1.0.0a10)
  Created temporary directory: /tmp/pip-unpack-nbca7ar9
  Downloading https://files.pythonhosted.org/packages/dd/7b/46066486ff977d801e24fde5582f92a818383a79695f107c9a7a6eb4cd78/buf-1.0.0a10-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/dd/7b/46066486ff977d801e24fde5582f92a818383a79695f107c9a7a6eb4cd78/buf-1.0.0a10-py3-none-any.whl#sha256=a72cca712d8b633a385f5215a902e968b9d4afeec7e6c6b3111d6ad8166f8239 (from https://pypi.org/simple/buf/) (requires-python:>=3.5)
  Saved /tmp/tmpe3p09qff/buf-1.0.0a10-py3-none-any.whl
  Added buf==1.0.0a10 from https://files.pythonhosted.org/packages/dd/7b/46066486ff977d801e24fde5582f92a818383a79695f107c9a7a6eb4cd78/buf-1.0.0a10-py3-none-any.whl#sha256=a72cca712d8b633a385f5215a902e968b9d4afeec7e6c6b3111d6ad8166f8239 to build tracker '/tmp/pip-req-tracker-mnqi8ri_'
  Removed buf==1.0.0a10 from https://files.pythonhosted.org/packages/dd/7b/46066486ff977d801e24fde5582f92a818383a79695f107c9a7a6eb4cd78/buf-1.0.0a10-py3-none-any.whl#sha256=a72cca712d8b633a385f5215a902e968b9d4afeec7e6c6b3111d6ad8166f8239 from build tracker '/tmp/pip-req-tracker-mnqi8ri_'
Skipping buf, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-4utyf7um/buf
Removed build tracker '/tmp/pip-req-tracker-mnqi8ri_'