I've applied the more recent version of _settings.scss as a temporary fix, but I'd feel better about this if prior to release the theme was generated by a more recent version of zurb_foundation. Ideally alpha 3 if released, if not the latest dev will have to be used.
The initial theme encounters errors building css due to the following issue: https://www.drupal.org/node/2859268
I've applied the more recent version of _settings.scss as a temporary fix, but I'd feel better about this if prior to release the theme was generated by a more recent version of zurb_foundation. Ideally alpha 3 if released, if not the latest dev will have to be used.