Created temporary directory: /tmp/pip-ephem-wheel-cache-bx_mj2rx
Created temporary directory: /tmp/pip-req-tracker-angs70_g
Created requirements tracker '/tmp/pip-req-tracker-angs70_g'
Created temporary directory: /tmp/pip-wheel-3nrb_537
Collecting flit-core==2.0
  1 location(s) to search for versions of flit-core:
  * https://pypi.org/simple/flit-core/
  Getting page https://pypi.org/simple/flit-core/
  Analyzing links from page https://pypi.org/simple/flit-core/
    Found link https://files.pythonhosted.org/packages/12/4f/8a0a7b2033b8a80451d214a289aecf486afdfb8e155b25986b0cbd3eb6e8/flit_core-2.0rc1-py2.py3-none-any.whl#sha256=1d717e7336997feed076c4f5dbdbe9ce45062e680f2b1de319b4c759f809a561 (from https://pypi.org/simple/flit-core/) (requires-python:>=2.7, !=3.0, !=3.1, !=3.2, != 3.3), version: 2.0rc1
    Found link https://files.pythonhosted.org/packages/7f/8c/583b4412da71153ec70ed78341983c242a234d47abcfc8485284c6bb7b48/flit_core-2.0rc1.tar.gz#sha256=d78f4b5b8fb2b484a98974b6da8d0edc8e7af55f60da7f40e0a9ddd2c36a5932 (from https://pypi.org/simple/flit-core/) (requires-python:>=2.7, !=3.0, !=3.1, !=3.2, != 3.3), version: 2.0rc1
    Found link https://files.pythonhosted.org/packages/d0/72/0fe258ce61fa1b59adb6c76a701b19a96e0033fbe054b297a2012e33ad44/flit_core-2.0rc2-py2.py3-none-any.whl#sha256=35a83504f509fcfd19bc53859d938cf2ad3385a2a19bfeb1745d1c957d39115c (from https://pypi.org/simple/flit-core/) (requires-python:>=2.7, !=3.0, !=3.1, !=3.2, != 3.3), version: 2.0rc2
    Found link https://files.pythonhosted.org/packages/2f/1b/41ac0da91712d9c3e7d06a6e1eb7dfe616c96a14e4036e9b9c37ea9ee6f8/flit_core-2.0rc2.tar.gz#sha256=b34eef2a6da426c659b5bbfc7a18cbfba2a72bbf7dc20d75a15fd5fc90c1d937 (from https://pypi.org/simple/flit-core/) (requires-python:>=2.7, !=3.0, !=3.1, !=3.2, != 3.3), version: 2.0rc2
    Found link https://files.pythonhosted.org/packages/6a/ff/be83d749ff1ad481b09e1e6069178c2d5d6c56a10b493353f0cc405e8475/flit_core-2.0rc3-py2.py3-none-any.whl#sha256=9c5e882e51ddb4206626f576f0a8217ebdf011ab34aeb9d4bb91f101cad03981 (from https://pypi.org/simple/flit-core/) (requires-python:>=2.7, !=3.0, !=3.1, !=3.2, != 3.3), version: 2.0rc3
    Found link https://files.pythonhosted.org/packages/2d/36/bcd4bfb529261a27f113eb2e6fb9f5e5aed4d0b79be59a76ce65689a1892/flit_core-2.0rc3.tar.gz#sha256=207a70987a60e67c475955996813ed95d485f97eee288d03fc04bff01b2c56b8 (from https://pypi.org/simple/flit-core/) (requires-python:>=2.7, !=3.0, !=3.1, !=3.2, != 3.3), version: 2.0rc3
    Found link https://files.pythonhosted.org/packages/dc/81/1f336b50c81e5345aafe7469e4f4c1104faa82b76e6e9885456b47d898fe/flit_core-2.0-py2.py3-none-any.whl#sha256=6315800ae208f0f1de1ee89997e16f69dacc5e18d3fd2a65e4e518e3d78dbdda (from https://pypi.org/simple/flit-core/) (requires-python:>=2.7, !=3.0, !=3.1, !=3.2, != 3.3), version: 2.0
    Found link https://files.pythonhosted.org/packages/ec/cc/60e05480a5bf4b44ee1dbd179ca715ca4d192597d054e8c97bc0403060e8/flit_core-2.0.tar.gz#sha256=8e91d877c663b16e70d88a2f652bc9e0ae71501cbb81c5ab8d48c838e731ba80 (from https://pypi.org/simple/flit-core/) (requires-python:>=2.7, !=3.0, !=3.1, !=3.2, != 3.3), version: 2.0
  Using version 2.0 (newest of versions: 2.0)
  Created temporary directory: /tmp/pip-unpack-xaz9lmo9
  Downloading https://files.pythonhosted.org/packages/dc/81/1f336b50c81e5345aafe7469e4f4c1104faa82b76e6e9885456b47d898fe/flit_core-2.0-py2.py3-none-any.whl (84kB)
  Downloading from URL https://files.pythonhosted.org/packages/dc/81/1f336b50c81e5345aafe7469e4f4c1104faa82b76e6e9885456b47d898fe/flit_core-2.0-py2.py3-none-any.whl#sha256=6315800ae208f0f1de1ee89997e16f69dacc5e18d3fd2a65e4e518e3d78dbdda (from https://pypi.org/simple/flit-core/) (requires-python:>=2.7, !=3.0, !=3.1, !=3.2, != 3.3)
  Saved /tmp/tmpbhif5r41/flit_core-2.0-py2.py3-none-any.whl
  Added flit-core==2.0 from https://files.pythonhosted.org/packages/dc/81/1f336b50c81e5345aafe7469e4f4c1104faa82b76e6e9885456b47d898fe/flit_core-2.0-py2.py3-none-any.whl#sha256=6315800ae208f0f1de1ee89997e16f69dacc5e18d3fd2a65e4e518e3d78dbdda to build tracker '/tmp/pip-req-tracker-angs70_g'
  Removed flit-core==2.0 from https://files.pythonhosted.org/packages/dc/81/1f336b50c81e5345aafe7469e4f4c1104faa82b76e6e9885456b47d898fe/flit_core-2.0-py2.py3-none-any.whl#sha256=6315800ae208f0f1de1ee89997e16f69dacc5e18d3fd2a65e4e518e3d78dbdda from build tracker '/tmp/pip-req-tracker-angs70_g'
Skipping flit-core, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-3nrb_537/flit-core
Removed build tracker '/tmp/pip-req-tracker-angs70_g'