dotless import problem

content.less

@import "mixins.less";
.content
{
  border: 3px solid red;
  .curves(4px);
}

default.less

@import "layout.less";
@import "content.less";

layout.less

body
{
  border: 5px solid #000;
  .curves(10px);
}

mixins.less

.curves(@radius)
{
  border-radius: @radius;
}

output.css

body {
 border: 5px solid #000;
 border-radius: 10px;
 border-radius: 10px;
}
.content {
 border: 3px solid red;
 border-radius: 4px;
 border-radius: 4px;
}