Middleman Does Not Process _foundation-icons.scss

[JustinHardage]

1. I set up a middleman project with foundation, using axyz/middleman-zurb-foundation.
2. Then, I used bower install foundation-icon-fonts to install the font icon package.
3. I set up the foundation icon path in app.css.scss as $fi-path: "../bower_components/foundation-icon-fonts";
4. The middleman build output shows that the app.css file references url("foundation-icons.woff") at the root instead of the above path.

I discovered this was because the build was simply copying foundation-icons.css instead of processing _foundation-icons.scss. I resolved this by moving foundation-icons.css to a .bkp file name so that middleman would actually look into the scss file and see my new path.

Is this expected behavior? Is there some other pre-process step I should make before middleman build?