title: How to recompiles .css files starting from bootswatch .less files?
body: <p>I succesfully installed node and less</p>
  
  <p>I downloaded from bootswatch the following two files from them 'Flatly':</p>
  
  <ul>
  <li><a href="http://bootswatch.com/flatly/variables.less" rel="nofollow">variable.less</a></li>
  <li><a href="http://bootswatch.com/flatly/bootswatch.less" rel="nofollow">bootswatch.less</a></li>
  </ul>
  
  <p>Now I'd like simply create the final boostrap.css without do any modification, just to try if all is indetical to precooked bootstrap.css files from the same theme.</p>
  
  <p>I tried</p>
  
  <pre><code>lessc variables.less &gt; bootstrap.css
  </code></pre>
  
  <p>But I got empty boostrap.css file</p>
  
  <p>I tried</p>
  
  <pre><code>lessc bootswatch.less &gt; bootstrap.css
  </code></pre>
  
  <p>But I got</p>
  
  <blockquote>
    <p>NameError: variable @navbar-default-bg is undefined in
    C:\Users\\Downloads\ bootswatch.less on line 16, column 14: 15<br>
    background-color: #fff; 16       color: @navbar-default-bg; 17     }</p>
  </blockquote>
  
  <p>So I tried this</p>
  
  <pre><code>lessc variables.css bootswatch.less &gt; bootstrap.css
  </code></pre>
  
  <p>It give me no errors, but still I got an empty bootstrap.css file.</p>
  
  <p>Is there any way to compile .css using directly less or absolutely must I do all of the steps listed at Customization <a href="http://bootswatch.com/help/#customization" rel="nofollow">here</a> ?</p>