You will need to have guard to contine, so install it now!.
Install the gem with:
gem install guard-sass
Add it to your Gemfile:
And finally add a basic setup to your Guardfile with:
guard init sass
A guard extension that allows you to easily rebuild .sass (or .scss) files when changed.
guard 'sass' do watch('^sass/(.*)') end
Defaults to writing to 'css/' but this can be changed....
guard 'sass', :output => 'styles' do watch('^sass/(.*)') end