When trying to use nested rules in a .less file, they do not get compiled into the main file. I have also tried separating the css from the less but I still run into the same issue. I have tried:

<resourceSet name="siteCss" type="css">

  <resource path="~/content/Site.css" />
</resourceSet>
<resourceSet name="siteLess" type="css">
  <resource path="~/content/Home.less" />
</resourceSet>

and this:

<resourceSet name="siteCss" type="css">

  <resource path="~/content/Site.css" />
  <resource path="~/content/Home.less" />
</resourceSet>

When used by itself, dotless works correctly. Here is the example .less file:

.testClass
{

.innerClass
{
    a
    {
        margin: auto;
    }
}

}