title: Susy 2: How to remove "last" from nth-child on different breakpoint?
body: <p>I'm using Susy 2 and I have this code:</p>
  
  <pre><code>@include breakpoint($tab) {
    .l-region--sections {
      &gt; .block {
        @include span(6 of 12);
        &amp;:nth-child(2n) {
          @include last;
        }
      }
    }
  }
  
  @include breakpoint($desk) {
    .l-region--sections {
      &gt; .block {
        @include span(4 of 16);
        &amp;:last-child {
          @include last;
        }
      }
    }
  }
  </code></pre>
  
  <p>The problem is that at desktop width, the ":nth-child(2n)" takes effect and I would like to remove it completely in favor of ":last-child". How can I remove ":nth-child(2n)" styles for desktop?</p>