title: Could not find platform independent libraries <prefix>
body: <p>My travis job hit issue of following:</p>
  
  <pre><code>Process Output:Could not find platform independent libraries &lt;prefix&gt;
  Process Output:Could not find platform dependent libraries &lt;exec_prefix&gt;
  Process Output:Consider setting $PYTHONHOME to &lt;prefix&gt;[:&lt;exec_prefix&gt;]
  Process Output:Fatal Python error: Py_Initialize: Unable to get the locale encoding
  Process Output:ModuleNotFoundError: No module named 'encodings'
  </code></pre>
  
  <p>I have already tried to set PYTHONPATH and PYTHONHOME, but still doesn't work. Could anyone help me on that ? Thanks</p>
  
  <pre><code>export PYTHONHOME='$HOME/miniconda'
  export PYTHONPATH='$HOME/miniconda:$PYTHONPATH'
  </code></pre>