Actualización

app/Resources/public/assets/jquery.scrollbar/sass/Gruntfile.js

@@ -0,0 +1,22 @@
+module.exports = function (grunt) {
+    grunt.initConfig({
+        pkg: grunt.file.readJSON('package.json'),
+        compass: {
+            auto: {
+                options: {
+                    sassDir: './',
+                    cssDir: '../'
+                }
+            }
+        },
+        watch: {
+            scss: {
+                files: ['./**/*.scss'],
+                tasks: ['compass']
+            }
+        }
+    });
+    grunt.loadNpmTasks('grunt-contrib-compass');
+    grunt.loadNpmTasks('grunt-contrib-watch');
+    grunt.registerTask('default', ['watch']);
+};