Created temporary directory: /tmp/pip-ephem-wheel-cache-j83z1w_u
Created temporary directory: /tmp/pip-req-tracker-_c0iedxz
Created requirements tracker '/tmp/pip-req-tracker-_c0iedxz'
Created temporary directory: /tmp/pip-wheel-xnxqyhbt
Collecting pretextbook==0.0rc0
  1 location(s) to search for versions of pretextbook:
  * https://pypi.org/simple/pretextbook/
  Getting page https://pypi.org/simple/pretextbook/
  Analyzing links from page https://pypi.org/simple/pretextbook/
    Found link https://files.pythonhosted.org/packages/4f/40/4989f4ed0f36bf6b23edfa2c53c5b92c6adb3838f06468f237176ed9d489/pretextbook-0.0rc0-py3-none-any.whl#sha256=5225efadfc5037c1e09b71677c8b9363b1100d487540040206b289690df0338b (from https://pypi.org/simple/pretextbook/) (requires-python:>=3.4), version: 0.0rc0
    Found link https://files.pythonhosted.org/packages/cb/6f/9438e439082fdb8fc3185ac826a45fa16d591bdb17bc4db53a9fbc2b9c68/pretextbook-0.0rc0.tar.gz#sha256=bab1c21c71e8024d01d7b6c7a4493e738b26ff24d2ba0e520a7fd228fb729bab (from https://pypi.org/simple/pretextbook/) (requires-python:>=3.4), version: 0.0rc0
  Using version 0.0rc0 (newest of versions: 0.0rc0)
  Created temporary directory: /tmp/pip-unpack-7nrb0ihu
  Downloading https://files.pythonhosted.org/packages/4f/40/4989f4ed0f36bf6b23edfa2c53c5b92c6adb3838f06468f237176ed9d489/pretextbook-0.0rc0-py3-none-any.whl (561kB)
  Downloading from URL https://files.pythonhosted.org/packages/4f/40/4989f4ed0f36bf6b23edfa2c53c5b92c6adb3838f06468f237176ed9d489/pretextbook-0.0rc0-py3-none-any.whl#sha256=5225efadfc5037c1e09b71677c8b9363b1100d487540040206b289690df0338b (from https://pypi.org/simple/pretextbook/) (requires-python:>=3.4)
  Saved /tmp/tmp_eszs31d/pretextbook-0.0rc0-py3-none-any.whl
  Added pretextbook==0.0rc0 from https://files.pythonhosted.org/packages/4f/40/4989f4ed0f36bf6b23edfa2c53c5b92c6adb3838f06468f237176ed9d489/pretextbook-0.0rc0-py3-none-any.whl#sha256=5225efadfc5037c1e09b71677c8b9363b1100d487540040206b289690df0338b to build tracker '/tmp/pip-req-tracker-_c0iedxz'
  Removed pretextbook==0.0rc0 from https://files.pythonhosted.org/packages/4f/40/4989f4ed0f36bf6b23edfa2c53c5b92c6adb3838f06468f237176ed9d489/pretextbook-0.0rc0-py3-none-any.whl#sha256=5225efadfc5037c1e09b71677c8b9363b1100d487540040206b289690df0338b from build tracker '/tmp/pip-req-tracker-_c0iedxz'
Skipping pretextbook, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-xnxqyhbt/pretextbook
Removed build tracker '/tmp/pip-req-tracker-_c0iedxz'