title: How to have sourcemaps include all my LESS files with gulp
body: <p>I have two LESS files in my /less folder :</p>
  
  <p>main.less:</p>
  
  <pre><code>@import 'vars';
  
  body{
    background-color: @blau;
  }
  </code></pre>
  
  <p>and vars.less</p>
  
  <pre><code>@blau : #6621ab;
  </code></pre>
  
  <p>My gulp task using gulp-less and gulp-sourcemaps</p>
  
  <pre><code>gulp.task('less', function () {
    gulp.src('./less/main.less')
      .pipe(sourcemaps.init())
      .pipe(less())
      .pipe(sourcemaps.write())
      .pipe(gulp.dest('./public/'))
  });
  </code></pre>
  
  <p>CSS generation (at /public/main.css) works fine, but in sourcemaps, i can only see main.less, not vars.less . Any idea? Thanks in advance</p>