title: ERROR: More than one .egg-info directory found in /tmp/pip-pip-egg-info-<somehash>
body: <p>I'm trying to install <code>advisor</code> through <code>pip install advisor</code> but it fails with the following error:</p>
  <p><code>ERROR: More than one .egg-info directory found in /tmp/pip-pip-egg-info-&lt;somehash&gt;</code></p>
  <pre><code>$ pip --version
  pip 21.0.1 from /my_home/.local/lib/python3.6/site-packages/pip (python 3.6)
  </code></pre>
  <p>I tried this with two other ubuntu machines; one with the same pip version <code>21.0.1</code> and the other with an older pip <code>20.3.4</code>; the latter successfully installed while the former failed with the same error message. I'm inclined to think that this is a pip version issue.</p>
  <p>Anyone has other ideas to fix this?</p>