Created temporary directory: /tmp/pip-ephem-wheel-cache-zob8pqbk
Created temporary directory: /tmp/pip-req-tracker-92owr8pj
Created requirements tracker '/tmp/pip-req-tracker-92owr8pj'
Created temporary directory: /tmp/pip-wheel-fp90li30
Collecting Concern==2
  1 location(s) to search for versions of Concern:
  * https://pypi.org/simple/concern/
  Getting page https://pypi.org/simple/concern/
  Analyzing links from page https://pypi.org/simple/concern/
    Found link https://files.pythonhosted.org/packages/55/77/f23da887819ce869e59cd6a2208a65b8da05db561adda33344a02a00b0a9/Concern-1-py3-none-any.whl#sha256=e201a6ef1b6a0498ee76eab91160c11e916f39cecdcea7440443d915f027b892 (from https://pypi.org/simple/concern/), version: 1
    Found link https://files.pythonhosted.org/packages/73/c6/56d822e33265efb6f43e059d8e13705ecf8dfdcb4f1918b17835fe2bea17/Concern-1.tar.gz#sha256=7a5ea60222c30a8810de39b66b04798129475e8ab3e7464a0a854b671b91e4b8 (from https://pypi.org/simple/concern/), version: 1
    Found link https://files.pythonhosted.org/packages/66/73/f53d6ed2956a96539b2eda75b44973a1b422bb36175fcf4b2d8a2da615e6/Concern-2-py3-none-any.whl#sha256=1fc6964bbd586cc95b5054d3b790449267f494542676d59a22ff5a06b307a76a (from https://pypi.org/simple/concern/), version: 2
    Found link https://files.pythonhosted.org/packages/d0/fd/73edf06a3247b9e65905f3d1c86f203978d8330a607e94b179e286834038/Concern-2.tar.gz#sha256=df70f0756b4f5dc89e6591085fe98a60c56b1582f982cd4730df9ae6f594a53a (from https://pypi.org/simple/concern/), version: 2
    Found link https://files.pythonhosted.org/packages/cb/ed/63e51f35ad159694b27910684ad4d4c04bc27f9cd4f9d45578089f7948cf/Concern-3-py3-none-any.whl#sha256=99802c9e07b88e0acff4af3421d808ed39f77db65f5cfa9215f1a4c5e8f4d614 (from https://pypi.org/simple/concern/), version: 3
    Found link https://files.pythonhosted.org/packages/84/a5/71412e5fc00b4a9337329097513115864260c51e3374a7f59e80eba3352a/Concern-3.tar.gz#sha256=8035096719f25ae94f5b9f458fbfc98d99b6033dd184a583c240d6f2bd48fcb6 (from https://pypi.org/simple/concern/), version: 3
  Using version 2 (newest of versions: 2)
  Created temporary directory: /tmp/pip-unpack-5a1dn7ff
  Downloading https://files.pythonhosted.org/packages/66/73/f53d6ed2956a96539b2eda75b44973a1b422bb36175fcf4b2d8a2da615e6/Concern-2-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/66/73/f53d6ed2956a96539b2eda75b44973a1b422bb36175fcf4b2d8a2da615e6/Concern-2-py3-none-any.whl#sha256=1fc6964bbd586cc95b5054d3b790449267f494542676d59a22ff5a06b307a76a (from https://pypi.org/simple/concern/)
  Saved /tmp/tmp0z2gqalv/Concern-2-py3-none-any.whl
  Added Concern==2 from https://files.pythonhosted.org/packages/66/73/f53d6ed2956a96539b2eda75b44973a1b422bb36175fcf4b2d8a2da615e6/Concern-2-py3-none-any.whl#sha256=1fc6964bbd586cc95b5054d3b790449267f494542676d59a22ff5a06b307a76a to build tracker '/tmp/pip-req-tracker-92owr8pj'
  Removed Concern==2 from https://files.pythonhosted.org/packages/66/73/f53d6ed2956a96539b2eda75b44973a1b422bb36175fcf4b2d8a2da615e6/Concern-2-py3-none-any.whl#sha256=1fc6964bbd586cc95b5054d3b790449267f494542676d59a22ff5a06b307a76a from build tracker '/tmp/pip-req-tracker-92owr8pj'
Skipping Concern, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-fp90li30/Concern
Removed build tracker '/tmp/pip-req-tracker-92owr8pj'