Config file for Cake with Prepros, change the css_dir relativeness to what suites. Also change output filename.

config.rb

css_dir = "../../www/app/View/Themed/Admin/webroot/css/"
sass_dir = "/"
output_style = :compressed


require 'fileutils'
on_stylesheet_saved do |file|
	if File.exists?(file)
	    puts "Moving: #{file}"
	    FileUtils.mv(file,File.dirname(file) + "/admin.min.css")
	end
end