title: Run Salt minion specifying the Python path
body: <p>Is there any way to specify the python interpreter that has to be used to run the salt-minion?</p>
  
  <p>I have several salt minions running on a local network.
  Most of them are working correctly but some minions are throwing errors and our guess is that the minion is running with python 3 instead of python 2 (we need to use <code>salt-2018.3.4-py2</code>)</p>
  
  <p>If I run <code>python --version</code> it says the version is 3.7. How can we force the minion to use python 2.7?</p>
  
  <p>Thanks.</p>