# File lib/compass-rails.rb, line 12
    def setup_fake_rails_env_paths(sprockets_env)
      return unless rails_loaded?

      if sprockets_env.respond_to?(:trail, true)
        sprockets_trail = sprockets_env.send(:trail)
      else
        sprockets_trail = sprockets_env.index
      end

      keys = ['app/assets', 'lib/assets', 'vendor/assets']
      local = keys.map {|path| ::Rails.root.join(path) }.map { |path| [File.join(path, 'images'), File.join(path, 'stylesheets')] }.flatten!
      sprockets_trail.paths.unshift(*local)
      paths = []
      ::Rails::Engine.subclasses.each do |subclass|
        paths = subclass.paths
        keys.each do |key|
          sprockets_trail.paths.unshift(*paths[key].existent_directories)
        end
      end
    end