Created temporary directory: /tmp/pip-ephem-wheel-cache-me1u9hgn
Created temporary directory: /tmp/pip-req-tracker-bvn2mrqk
Created requirements tracker '/tmp/pip-req-tracker-bvn2mrqk'
Created temporary directory: /tmp/pip-wheel-6yiwib3w
Collecting jupyter-book==0.1
  1 location(s) to search for versions of jupyter-book:
  * https://pypi.org/simple/jupyter-book/
  Getting page https://pypi.org/simple/jupyter-book/
  Analyzing links from page https://pypi.org/simple/jupyter-book/
    Found link https://files.pythonhosted.org/packages/62/02/7c5a91aec9361dabe65e2f9be35244f5f9dd69d1053e36462e8dc01cd729/jupyter-book-0.1.tar.gz#sha256=1a0bfd2c4c607c83d7b5c650e380a6d14ac02e23753c0b5d93dac282f4ed0d5f (from https://pypi.org/simple/jupyter-book/) (requires-python:>=3.4), version: 0.1
    Found link https://files.pythonhosted.org/packages/e5/83/ca521c00b8f74f97fb22cd6c80b6b46a2a3054374024ef7ad6db3b5ce732/jupyter_book-0.1-py3-none-any.whl#sha256=7a90477a7334d3540e03b6d5dd960d72daefcd397a644a513af55d40deb94e0f (from https://pypi.org/simple/jupyter-book/) (requires-python:>=3.4), version: 0.1
    Found link https://files.pythonhosted.org/packages/4a/07/8f7c1da9f1c2f38cbefa9daa9e07702135e2bd1af4e7a4b3a8f208b12445/jupyter_book-0.3-py2.py3-none-any.whl#sha256=f769560d8b7e5b7b08d476d3144262b40252ad47b421461ebef3743d3b33afc8 (from https://pypi.org/simple/jupyter-book/), version: 0.3
    Found link https://files.pythonhosted.org/packages/86/2a/6c4e056bd07241f1027dbdc570cf027a191feacec94ab2ea1d6a3200e7fc/jupyter_book-0.3.tar.gz#sha256=21df78e2af861ed8085c946671c71c57fbc1737090561a8013ad37857df227dd (from https://pypi.org/simple/jupyter-book/), version: 0.3
  Using version 0.1 (newest of versions: 0.1)
  Created temporary directory: /tmp/pip-unpack-z9316tay
  Downloading https://files.pythonhosted.org/packages/e5/83/ca521c00b8f74f97fb22cd6c80b6b46a2a3054374024ef7ad6db3b5ce732/jupyter_book-0.1-py3-none-any.whl (3.7MB)
  Downloading from URL https://files.pythonhosted.org/packages/e5/83/ca521c00b8f74f97fb22cd6c80b6b46a2a3054374024ef7ad6db3b5ce732/jupyter_book-0.1-py3-none-any.whl#sha256=7a90477a7334d3540e03b6d5dd960d72daefcd397a644a513af55d40deb94e0f (from https://pypi.org/simple/jupyter-book/) (requires-python:>=3.4)
  Saved /tmp/tmpa8l7jxwg/jupyter_book-0.1-py3-none-any.whl
  Added jupyter-book==0.1 from https://files.pythonhosted.org/packages/e5/83/ca521c00b8f74f97fb22cd6c80b6b46a2a3054374024ef7ad6db3b5ce732/jupyter_book-0.1-py3-none-any.whl#sha256=7a90477a7334d3540e03b6d5dd960d72daefcd397a644a513af55d40deb94e0f to build tracker '/tmp/pip-req-tracker-bvn2mrqk'
  Removed jupyter-book==0.1 from https://files.pythonhosted.org/packages/e5/83/ca521c00b8f74f97fb22cd6c80b6b46a2a3054374024ef7ad6db3b5ce732/jupyter_book-0.1-py3-none-any.whl#sha256=7a90477a7334d3540e03b6d5dd960d72daefcd397a644a513af55d40deb94e0f from build tracker '/tmp/pip-req-tracker-bvn2mrqk'
Skipping jupyter-book, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-6yiwib3w/jupyter-book
Removed build tracker '/tmp/pip-req-tracker-bvn2mrqk'