How do I import a .scss.erb file in middleman4?

How do I import a .scss.erb file in Middleman 4?

I just upgraded from Middleman 3 to 4. I think this is my last issue...

I have an all.css.scss file that looks like this:

@charset "utf-8";

@import "settings";
@import "imports";
@import "base";
@import "signature_pad"

All the files import except for imports.

The difference with settings is that it is _imports.scss.erb

Then when I try and load all.css I get this:

Error: File to import not found or unreadable: imports.
       Load paths:
         /Users/myMyserId/apps/projectName/source/assets/css
         /Users/myUserId/.rvm/gems/ruby-2.0.0-p451/gems/compass-core-1.0.3/stylesheets
         Compass::SpriteImporter
         /Users/myUserId/apps/projectName/source/assets/css
         /Users/myUserId/.rvm/gems/ruby-2.0.0-p451/gems/compass-core-1.0.3/stylesheets
         Compass::SpriteImporter
         /Users/myUserId/apps/projectName/source/assets/css
         /Users/myUserId/.rvm/gems/ruby-2.0.0-p451/gems/compass-core-1.0.3/stylesheets
         Compass::SpriteImporter
        on line 4 of /Users/myUserId/apps/projectName/source/assets/css/all.css.scss

I think the issue is that the erb is not processing the file before making it a .scss.