title: pip install fails with failed to parse error
body: <pre><code>ERROR: Could not install packages due to an EnvironmentError: Failed to parse: 
  </code></pre>
  
  <p>I am using below command for installation
  <code>python3.7 -m pip install --user xxx-scanner</code></p>
  
  <p>I tried this command on ubuntu vm.This command works in my vm but fails from travis setup</p>
  
  <p><code>ubuntu dist: xenial</code></p>