config.rb

# grids and stuff
require 'ninesixty'

http_path = "/"
css_dir = "../build/css"
sass_dir = "./"
images_dir = "../images"
relative_assets = false
fonts_dir = "../fonts"
output_style = :expanded

# experimental: http://bricss.net/post/33788072565/using-sass-source-maps-in-webkit-inspector
sass_options = { :debug_info => true }

if environment == :development
  sass_options = { :debug_info => true }
end

That worked like a charm, thank you Chris.