Created temporary directory: /tmp/pip-ephem-wheel-cache-xn3iid63
Created temporary directory: /tmp/pip-req-tracker-3j175m_p
Created requirements tracker '/tmp/pip-req-tracker-3j175m_p'
Created temporary directory: /tmp/pip-wheel-d0jlpt6d
Collecting pen==0.1.0a1
  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
    Found link https://files.pythonhosted.org/packages/94/6c/29ba67c0371700798b2465e28ffd9e07940e81f9989f342b9e01966c245d/pen-0.1.0a1-py3-none-any.whl#sha256=ff4c47ee5f85631b63de21bebe4a2cc86efc4f6efa7d98adbe799b6e5f2f70f1 (from https://pypi.org/simple/pen/), version: 0.1.0a1
    Found link https://files.pythonhosted.org/packages/e6/d6/e27bd91db909d7a35ab37da4bb54bd86fada7b6c9d11c55e1669b2e44752/pen-0.1.0a1.tar.gz#sha256=ca00391762e0170f3d4bdc1a334cefb5e66d99e34626367f164aa0c7c0907a7c (from https://pypi.org/simple/pen/), version: 0.1.0a1
  Using version 0.1.0a1 (newest of versions: 0.1.0a1)
  Created temporary directory: /tmp/pip-unpack-zybzjvg8
  Downloading https://files.pythonhosted.org/packages/94/6c/29ba67c0371700798b2465e28ffd9e07940e81f9989f342b9e01966c245d/pen-0.1.0a1-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/94/6c/29ba67c0371700798b2465e28ffd9e07940e81f9989f342b9e01966c245d/pen-0.1.0a1-py3-none-any.whl#sha256=ff4c47ee5f85631b63de21bebe4a2cc86efc4f6efa7d98adbe799b6e5f2f70f1 (from https://pypi.org/simple/pen/)
  Saved /tmp/tmplf94t3kn/pen-0.1.0a1-py3-none-any.whl
  Added pen==0.1.0a1 from https://files.pythonhosted.org/packages/94/6c/29ba67c0371700798b2465e28ffd9e07940e81f9989f342b9e01966c245d/pen-0.1.0a1-py3-none-any.whl#sha256=ff4c47ee5f85631b63de21bebe4a2cc86efc4f6efa7d98adbe799b6e5f2f70f1 to build tracker '/tmp/pip-req-tracker-3j175m_p'
  Removed pen==0.1.0a1 from https://files.pythonhosted.org/packages/94/6c/29ba67c0371700798b2465e28ffd9e07940e81f9989f342b9e01966c245d/pen-0.1.0a1-py3-none-any.whl#sha256=ff4c47ee5f85631b63de21bebe4a2cc86efc4f6efa7d98adbe799b6e5f2f70f1 from build tracker '/tmp/pip-req-tracker-3j175m_p'
Skipping pen, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-d0jlpt6d/pen
Removed build tracker '/tmp/pip-req-tracker-3j175m_p'