Index: src/sunstone/public/Gruntfile.js
--- src/sunstone/public/Gruntfile.js
+++ src/sunstone/public/Gruntfile.js
@@ -14,6 +14,8 @@
 /* limitations under the License.                                             */
 /* -------------------------------------------------------------------------- */

+const sass = require('node-sass');
+
 module.exports = function(grunt) {
   grunt.initConfig({
     pkg: grunt.file.readJSON("package.json"),
@@ -24,7 +26,8 @@
       },
       dist: {
         options: {
-          outputStyle: "compressed"
+          outputStyle: "compressed",
+	         implementation: sass
         },
         files: {
           "css/app.css": "scss/app.scss"