title: Jekyll Config Multiple Files
body: <p>As the <a href="http://jekyllrb.com/docs/configuration/" rel="noreferrer">doc</a> mentions, we should be able to write:</p>
  
  <pre><code>jekyll build --config "_config.yml, _config.en.yml"
  </code></pre>
  
  <p>Instead, I receive:</p>
  
  <pre><code>Fatal: The configuration file ' _config.en.yml' could not be found.
  </code></pre>
  
  <p>While the file actually exists.</p>
  
  <p>What am I doing wrong?</p>