_variables.scss does not get created or loaded in sub-theme

Hi all,

I'm using Zurb Foundation 7.x-5.0-rc6. I created a sub-theme for the Zurb Foundation theme using "drush fst mytheme" as the README.txt suggests. That successfully created a sub-theme but it did not create a _variables.scss file in mytheme/scss. So I copied over _settings.scss from the base theme (zurb_foundation/scss/foundation/_settings.scss) into _variables_scss in mytheme/scss.

However, _variables.scss was not being loaded anywhere so none of its settings were taking effect. So I modified mytheme/scss/base/_init.scss as follows:

@import "../../zurb_foundation/scss/foundation/functions";
@import "../variables";

This seemed to work, but I'm not sure if this is the right thing to do. Is this a bug and did I use the correct work-around?
Thanks.