Created temporary directory: /tmp/pip-ephem-wheel-cache-e8d9rbuu
Created temporary directory: /tmp/pip-req-tracker-qjq62cck
Created requirements tracker '/tmp/pip-req-tracker-qjq62cck'
Created temporary directory: /tmp/pip-wheel-pxolyy3i
Collecting pen==0.1.0a0
  1 location(s) to search for versions of pen:
  * https://pypi.org/simple/pen/
  Getting page https://pypi.org/simple/pen/
  Analyzing links from page https://pypi.org/simple/pen/
    Found link https://files.pythonhosted.org/packages/7f/85/e0f37c335b8c72e920096e476ac73e6add819279513b767ad591552c0414/pen-0.1.0a0-py3-none-any.whl#sha256=20083a1527f33da0f2146cb406a07b48a2e3a321cf20ad4cab030ad7b7f6cf3d (from https://pypi.org/simple/pen/), version: 0.1.0a0
    Found link https://files.pythonhosted.org/packages/ce/ce/44d9d7d25f29021ead61c565a47334558b01ad67fa08dcaacb10f4f7a471/pen-0.1.0a0.tar.gz#sha256=9548333052772ad9faff45859519c5519e35740a7f59839cc32a73f0a9ae6eeb (from https://pypi.org/simple/pen/), version: 0.1.0a0
  Using version 0.1.0a0 (newest of versions: 0.1.0a0)
  Created temporary directory: /tmp/pip-unpack-7rnzzy31
  Downloading https://files.pythonhosted.org/packages/7f/85/e0f37c335b8c72e920096e476ac73e6add819279513b767ad591552c0414/pen-0.1.0a0-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/7f/85/e0f37c335b8c72e920096e476ac73e6add819279513b767ad591552c0414/pen-0.1.0a0-py3-none-any.whl#sha256=20083a1527f33da0f2146cb406a07b48a2e3a321cf20ad4cab030ad7b7f6cf3d (from https://pypi.org/simple/pen/)
  Saved /tmp/tmpcqqn8h04/pen-0.1.0a0-py3-none-any.whl
  Added pen==0.1.0a0 from https://files.pythonhosted.org/packages/7f/85/e0f37c335b8c72e920096e476ac73e6add819279513b767ad591552c0414/pen-0.1.0a0-py3-none-any.whl#sha256=20083a1527f33da0f2146cb406a07b48a2e3a321cf20ad4cab030ad7b7f6cf3d to build tracker '/tmp/pip-req-tracker-qjq62cck'
  Removed pen==0.1.0a0 from https://files.pythonhosted.org/packages/7f/85/e0f37c335b8c72e920096e476ac73e6add819279513b767ad591552c0414/pen-0.1.0a0-py3-none-any.whl#sha256=20083a1527f33da0f2146cb406a07b48a2e3a321cf20ad4cab030ad7b7f6cf3d from build tracker '/tmp/pip-req-tracker-qjq62cck'
Skipping pen, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-pxolyy3i/pen
Removed build tracker '/tmp/pip-req-tracker-qjq62cck'