Created temporary directory: /tmp/pip-ephem-wheel-cache-jb2zr73a
Created temporary directory: /tmp/pip-req-tracker-e6qg5d_n
Created requirements tracker '/tmp/pip-req-tracker-e6qg5d_n'
Created temporary directory: /tmp/pip-wheel-jqav8dd4
Collecting os-sys==0.2.7
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  Getting page https://pypi.org/simple/os-sys/
  Analyzing links from page https://pypi.org/simple/os-sys/
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  Saved /tmp/tmp_nhtsdqe/os_sys-0.2.7-py3-none-any.whl
  Added os-sys==0.2.7 from https://files.pythonhosted.org/packages/4e/a5/62b65cdd9c19359a0ea90689c7a8ec52b25618a3f3b9783e637531623993/os_sys-0.2.7-py3-none-any.whl#sha256=50a4f23c2ed8505236604138a50a24a930395f789ce9f78389869ae077d36922 to build tracker '/tmp/pip-req-tracker-e6qg5d_n'
  Removed os-sys==0.2.7 from https://files.pythonhosted.org/packages/4e/a5/62b65cdd9c19359a0ea90689c7a8ec52b25618a3f3b9783e637531623993/os_sys-0.2.7-py3-none-any.whl#sha256=50a4f23c2ed8505236604138a50a24a930395f789ce9f78389869ae077d36922 from build tracker '/tmp/pip-req-tracker-e6qg5d_n'
Skipping os-sys, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-wheel-jqav8dd4/os-sys
Removed build tracker '/tmp/pip-req-tracker-e6qg5d_n'