请教高手，koala中compass怎么配置？

最近使用sass && compass，配置了ruby环境，通过ruby直接编辑正常使用，但是比较麻烦，每次都得打开命令，想使用koala在的compass，但不不知道怎么用

config.rb

"

require 'zurb-foundation'
require 'zen-grids'
# Require any additional compass plugins here.

# Set this to the root of your project when deployed:
http_path = "/"
css_dir = "stylesheets"
sass_dir = "sass"
images_dir = "images"
javascripts_dir = "javascripts"

# You can select your preferred output style here (can be overridden via the command line):
# output_style = :expanded or :nested or :compact or :compressed

# To enable relative paths to assets via compass helper functions. Uncomment:
# relative_assets = true

# To disable debugging comments that display the original location of your selectors. Uncomment:
# line_comments = false


# If you prefer the indented syntax, you might want to regenerate this
# project again passing --syntax sass, or you can uncomment this:
# preferred_syntax = :sass
# and then run:
# sass-convert -R --from scss --to sass sass scss && rm -rf sass && mv scss sass

"

使用命令

@import "compass/reset";
@import "compass/css3";

这些时，koala报错