# File lib/sass/less.rb, line 107
      def build_with_sass(env)
        line = input.line_of(interval.first)
        import = Sass::Tree::ImportNode.new(url.value.gsub(/\.less$/, ''))
        import.line = input.line_of(interval.first)
        env << Node::SassNode.new(import)
        old_rules = env.rules.dup
        build_without_sass env
        (env.rules - old_rules).each {|r| r.hide_in_sass = true}
      rescue ImportError => e
        raise Sass::SyntaxError.new("File to import #{url.text_value} not found or unreadable", :line => line)
      end