Created temporary directory: /tmp/pip-ephem-wheel-cache-eo55koc5
Created temporary directory: /tmp/pip-req-tracker-3wm40dxr
Created requirements tracker '/tmp/pip-req-tracker-3wm40dxr'
Created temporary directory: /tmp/pip-wheel-dxw9jf6f
Collecting pypref==3.1.0
  1 location(s) to search for versions of pypref:
  * https://pypi.org/simple/pypref/
  Getting page https://pypi.org/simple/pypref/
  Analyzing links from page https://pypi.org/simple/pypref/
    Found link https://files.pythonhosted.org/packages/d4/06/3b358bf510c4d2f63ac233ef7d8a5792a72a37e7e3042defb292139767c4/pypref-1.0.0.tar.gz#sha256=292263f3e5b1fa7d2ecb3e8d27cf185d9b6e0226762848dbda5af7b318df8726 (from https://pypi.org/simple/pypref/), version: 1.0.0
    Found link https://files.pythonhosted.org/packages/a2/26/b381ca52e92b3eb443ce37d84ad69e5f4f38400cb79aabe6459641514672/pypref-1.0.1.tar.gz#sha256=e89627943695b1c0acd23ea3cf6c48d063771c006f78692787c5f94e6fbddef0 (from https://pypi.org/simple/pypref/), version: 1.0.1
    Found link https://files.pythonhosted.org/packages/5b/ee/6ecc08bae1c19d5735cf952924ac9ee64a994d3dfa2599a1ae42e09ccb0c/pypref-1.0.2.tar.gz#sha256=ac5c8fc3dbdf58a4ee8784638888f9f85781a35705cac771e89afa6bece45fdd (from https://pypi.org/simple/pypref/), version: 1.0.2
    Found link https://files.pythonhosted.org/packages/81/b9/d9bed6f03962b527a752caddad972ca92df92621d6ba51118349098f0864/pypref-1.0.3.tar.gz#sha256=920570ef79c9eba1625517d35c48f2842aa3bc8bccf8e3eab52ecc64e820e5cb (from https://pypi.org/simple/pypref/), version: 1.0.3
    Skipping link https://files.pythonhosted.org/packages/3b/16/0457776dfa0f84f7f1c97bebb1e457961119aca00b74e4f419f38ce88f00/pypref-1.0.4-py2-none-any.whl#sha256=ca0f84c1398227ba32756dee6fa3554c9a37e9c28e9443d179a9789634aa3bf3 (from https://pypi.org/simple/pypref/); it is not compatible with this Python
    Found link https://files.pythonhosted.org/packages/7e/c4/29f2a6ecea87fdafc3eb959d2fbeca7fcf048b5f2afcba8d581b0db273a6/pypref-1.0.4.tar.gz#sha256=eb50ff2f11a573b4379d49348b970b90a310e6d0b9ce080bbde0c2e830454350 (from https://pypi.org/simple/pypref/), version: 1.0.4
    Skipping link https://files.pythonhosted.org/packages/60/24/287054b84bc3783634bc37f76f5aa91dbb7f917040239e2b2bc80e66e315/pypref-2.0.0-py2-none-any.whl#sha256=be8c7405f7212a6d8cae009174cf62c6d2db7b3b65f6ff58d82ce2460a169566 (from https://pypi.org/simple/pypref/); it is not compatible with this Python
    Found link https://files.pythonhosted.org/packages/c5/87/15587e3b4265352a1f20229c1039a2e4f2dbcd5a58a46efd873f969dba46/pypref-2.0.0.tar.gz#sha256=fcaeea6fdf968801a89d7cc2b3f74bdd46158909adc993d90a21396f71fd7c72 (from https://pypi.org/simple/pypref/), version: 2.0.0
    Found link https://files.pythonhosted.org/packages/76/5d/0082bd6795d77dcd9133232546a264ec5fd01ef89d8ae7ca1563140be58a/pypref-3.0.2.tar.gz#sha256=4337a8d5742b56cd9c87443c16eac11057ec85ca6042dac1a7e0162333123b1a (from https://pypi.org/simple/pypref/), version: 3.0.2
    Found link https://files.pythonhosted.org/packages/91/22/575a3c05576b3b0c06d84582b788dd8e402fd966685cb1e84be036f41e0d/pypref-3.1.0-py3-none-any.whl#sha256=d40a4b26381440e70eaaea836d15fba298e83d645a23f2cd0d825d9ac64a8446 (from https://pypi.org/simple/pypref/), version: 3.1.0
    Found link https://files.pythonhosted.org/packages/d7/59/b2390b65c71ef27b69d021d485b3ec93392f3d4c6b5e9497478bd2dbd904/pypref-3.1.0.tar.gz#sha256=b1d00dc56d20438fc43e17a4b0e8c00d3348b7c71a9430e3bd27b1a76dfc97c0 (from https://pypi.org/simple/pypref/), version: 3.1.0
  Using version 3.1.0 (newest of versions: 3.1.0)
  Created temporary directory: /tmp/pip-unpack-pukfmy8g
  Downloading https://files.pythonhosted.org/packages/91/22/575a3c05576b3b0c06d84582b788dd8e402fd966685cb1e84be036f41e0d/pypref-3.1.0-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/91/22/575a3c05576b3b0c06d84582b788dd8e402fd966685cb1e84be036f41e0d/pypref-3.1.0-py3-none-any.whl#sha256=d40a4b26381440e70eaaea836d15fba298e83d645a23f2cd0d825d9ac64a8446 (from https://pypi.org/simple/pypref/)
  Saved /tmp/tmpdcgl0h7k/pypref-3.1.0-py3-none-any.whl
  Added pypref==3.1.0 from https://files.pythonhosted.org/packages/91/22/575a3c05576b3b0c06d84582b788dd8e402fd966685cb1e84be036f41e0d/pypref-3.1.0-py3-none-any.whl#sha256=d40a4b26381440e70eaaea836d15fba298e83d645a23f2cd0d825d9ac64a8446 to build tracker '/tmp/pip-req-tracker-3wm40dxr'
  Removed pypref==3.1.0 from https://files.pythonhosted.org/packages/91/22/575a3c05576b3b0c06d84582b788dd8e402fd966685cb1e84be036f41e0d/pypref-3.1.0-py3-none-any.whl#sha256=d40a4b26381440e70eaaea836d15fba298e83d645a23f2cd0d825d9ac64a8446 from build tracker '/tmp/pip-req-tracker-3wm40dxr'
Skipping pypref, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-dxw9jf6f/pypref
Removed build tracker '/tmp/pip-req-tracker-3wm40dxr'