class Tilt::SassPlusCSSFilenameTemplate

def sass_options
  location_of_sass_file = Middleman::Server.environment == :build ? 
                            File.join(Middleman::Server.root, Middleman::Server.build_dir) : 
                            Middleman::Server.public
  parts = basename.split('.')
  parts.pop
  css_filename = File.join(location_of_sass_file, Middleman::Server.css_dir, parts.join("."))
  super.merge(::Compass.configuration.to_sass_engine_options).merge(:css_filename => css_filename)
end