Compass and Foundation 6.6.3

I’m trying to install Foundation 6.6.3 with compass, but it doesn’t generate the css files for me.

The scss files are in the bower_components and node_modules folder.

The Compass config.rb file:

require 'compass/import-once/activate'
# Require any additional compass plugins here.
add_import_path "bower_components/foundation-sites/scss"

# Set this to the root of your project when deployed:
http_path = "/"
css_dir = "public/css"
sass_dir = "scss"
images_dir = "public/immagini"
javascripts_dir = "public/js"

# 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 scss scss && rm -rf sass && mv scss sass