title: nodemon, babel-node: how to set environment variable?
body: <p>Dev environment starts with this command:</p>
  
  <pre><code>nodemon -w src --exec \"babel-node src --presets es2015,stage-0\"
  </code></pre>
  
  <p>How do i create a global variable (or <code>process.env</code> variable) <code>__DEV__ = true</code>?</p>