Command line utility sass is required, http://sass-lang.com/. Make sure sass location is in emacs PATH, example:
(setq exec-path (cons (expand-file-name "~/.gem/ruby/1.8/bin") exec-path))
‘scss-sass-command’ to point directly to your sass executable.
Add something like this to your emacs load file:
(add-to-list 'load-path (expand-file-name "~/.emacs.d/folder-where-you-put-scss-mode-el")) (autoload 'scss-mode "scss-mode") (add-to-list 'auto-mode-alist '("\\.scss\\'" . scss-mode))