Created temporary directory: /tmp/pip-ephem-wheel-cache-cpswsuex
Created temporary directory: /tmp/pip-req-tracker-3nnhqm27
Created requirements tracker '/tmp/pip-req-tracker-3nnhqm27'
Created temporary directory: /tmp/pip-wheel-bebwzn9a
Collecting caisson==0.0.1
  1 location(s) to search for versions of caisson:
  * https://pypi.org/simple/caisson/
  Getting page https://pypi.org/simple/caisson/
  Analyzing links from page https://pypi.org/simple/caisson/
    Found link https://files.pythonhosted.org/packages/28/7a/0ddb97075a4c883c6d3dec2123e0cdca04e699dc00d4648f438ad1d0c199/caisson-0.0.1-py3-none-any.whl#sha256=6b8a7faaa1861cc13a4ed01de46513b51d622260da3019480558b13aa500c0a1 (from https://pypi.org/simple/caisson/), version: 0.0.1
    Skipping link https://files.pythonhosted.org/packages/10/06/fbd168172bd0081f31d5e7a6ca9faabb064a84272508076cfc4a902eb140/caisson-0.0.1-py3.7.egg#sha256=a0db3aa6e171a717cb85f689b77c8b2eb988b1d97b29226a41607da864184ad0 (from https://pypi.org/simple/caisson/); unsupported archive format: .egg
    Found link https://files.pythonhosted.org/packages/ab/bd/f7f4d1e24dc2ae494564ce9106ffe5dc4397c796ec4ccc2228a5004c4858/caisson-0.0.1.tar.gz#sha256=0c54ffee22291434c8d15b413ef3d8b3751a694c675300920efc03cdbfe4b8ee (from https://pypi.org/simple/caisson/), version: 0.0.1
  Using version 0.0.1 (newest of versions: 0.0.1)
  Created temporary directory: /tmp/pip-unpack-_q5ul83h
  Downloading https://files.pythonhosted.org/packages/28/7a/0ddb97075a4c883c6d3dec2123e0cdca04e699dc00d4648f438ad1d0c199/caisson-0.0.1-py3-none-any.whl
  Downloading from URL https://files.pythonhosted.org/packages/28/7a/0ddb97075a4c883c6d3dec2123e0cdca04e699dc00d4648f438ad1d0c199/caisson-0.0.1-py3-none-any.whl#sha256=6b8a7faaa1861cc13a4ed01de46513b51d622260da3019480558b13aa500c0a1 (from https://pypi.org/simple/caisson/)
  Saved /tmp/tmpf9b91hxb/caisson-0.0.1-py3-none-any.whl
  Added caisson==0.0.1 from https://files.pythonhosted.org/packages/28/7a/0ddb97075a4c883c6d3dec2123e0cdca04e699dc00d4648f438ad1d0c199/caisson-0.0.1-py3-none-any.whl#sha256=6b8a7faaa1861cc13a4ed01de46513b51d622260da3019480558b13aa500c0a1 to build tracker '/tmp/pip-req-tracker-3nnhqm27'
  Removed caisson==0.0.1 from https://files.pythonhosted.org/packages/28/7a/0ddb97075a4c883c6d3dec2123e0cdca04e699dc00d4648f438ad1d0c199/caisson-0.0.1-py3-none-any.whl#sha256=6b8a7faaa1861cc13a4ed01de46513b51d622260da3019480558b13aa500c0a1 from build tracker '/tmp/pip-req-tracker-3nnhqm27'
Skipping caisson, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-bebwzn9a/caisson
Removed build tracker '/tmp/pip-req-tracker-3nnhqm27'