title: How to fix 'Command errored out with exit status 1' with pip install
body: <p>I'm experiencing some trouble installing pytype with <code>pip install</code> as shown here:</p>
  <p>OS: CentOS 7</p>
  <p>Python: Python 3.6</p>
  <p>Pip: 20.0.2</p>
  <pre class="lang-none prettyprint-override"><code>$ pip3 install pytype
  Collecting pytype
    Using cached pytype-2020.2.20.tar.gz (1.1 MB)
    Installing build dependencies: started
    Installing build dependencies: finished with status 'done'
    Getting requirements to build wheel: started
    Getting requirements to build wheel: finished with status 'error'
    ERROR: Command errored out with exit status 1:
     command: /home/aeu1/venv/bin/python3 /home/aeu1/venv/lib64/python3.6/site-packages/pip/_vendor/pep517/_in_process.py get_requires_for_build_wheel /tmp/tmp34nr30o0
         cwd: /tmp/pip-install-z9y24cb4/pytype
    Complete output (7 lines):
    running egg_info
    writing pytype.egg-info/PKG-INFO
    writing dependency_links to pytype.egg-info/dependency_links.txt
    writing entry points to pytype.egg-info/entry_points.txt
    writing requirements to pytype.egg-info/requires.txt
    writing top-level names to pytype.egg-info/top_level.txt
    error: package directory 'find:' does not exist
    ----------------------------------------
  ERROR: Command errored out with exit status 1: /home/aeu1/venv/bin/python3 /home/aeu1/venv/lib64/python3.6/site-packages/pip/_vendor/pep517/_in_process.py get_requires_for_build_wheel /tmp/tmp34nr30o0 Check the logs for full command output.
  </code></pre>