Collecting ZopeUndo==4.2
  1 location(s) to search for versions of ZopeUndo:
  * https://pypi.python.org/simple/zopeundo/
  Getting page https://pypi.python.org/simple/zopeundo/
  Analyzing links from page https://pypi.python.org/simple/zopeundo/
    Found link https://pypi.python.org/packages/31/97/c5c01955db8dcef3c74d46232c4f3aaad3f0e085bbdd0c89a7bae064fefe/ZopeUndo-4.0.zip#md5=7527b694f90c765d3e4ba1108f84e2c5 (from https://pypi.python.org/simple/zopeundo/), version: 4.0
    Found link https://pypi.python.org/packages/3c/fd/70e01b5c4279fab44edf9a57e62eef7996f7ad8742d75db736b00736b6b9/ZopeUndo-4.2-py2.py3-none-any.whl#md5=133b4b086206d6e18a768824014fe939 (from https://pypi.python.org/simple/zopeundo/), version: 4.2
    Found link https://pypi.python.org/packages/59/b3/891937a2193b0a6a9c6a058ec3a426be75b7a83c9409b2bebe5d2a6d67ba/ZopeUndo-2.12.0.zip#md5=2b8da09d1b98d5558f62e12f6e52c401 (from https://pypi.python.org/simple/zopeundo/), version: 2.12.0
    Found link https://pypi.python.org/packages/b5/25/c089c0f309dbefbe76d79d94568b6a1947cab4880f6eed54be704e42a3e8/ZopeUndo-4.2.tar.gz#md5=b18ebc963be3a3e0b32a3ab0f7242236 (from https://pypi.python.org/simple/zopeundo/), version: 4.2
    Found link https://pypi.python.org/packages/ce/40/51bc73896bdc23e1e16db55530c54f293d40d0a2c41e5a79efd4ea66dc1c/ZopeUndo-4.1.zip#md5=6f4d848b9f690ef0c1fc4f04622d0136 (from https://pypi.python.org/simple/zopeundo/), version: 4.1
  Using version 4.2 (newest of versions: 4.2)
  Downloading ZopeUndo-4.2-py2.py3-none-any.whl
  Downloading from URL https://pypi.python.org/packages/3c/fd/70e01b5c4279fab44edf9a57e62eef7996f7ad8742d75db736b00736b6b9/ZopeUndo-4.2-py2.py3-none-any.whl#md5=133b4b086206d6e18a768824014fe939 (from https://pypi.python.org/simple/zopeundo/)
  Saved /tmp/tmpdnc586oc/ZopeUndo-4.2-py2.py3-none-any.whl
Skipping ZopeUndo, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-gvebkqfd/ZopeUndo