WordPress SASS with Grunt

Hi there,

I have a theme which uses SASS. I am trying to set up Grunt to process the SCSS.

I have the following in my gruntfile.js:

module.exports = function(grunt) {
	grunt.initConfig({
		pkg: grunt.file.readJSON('package.json'),
		sass: {
			dist: {
				files: {
					'wp-content/themes/superlist/assets/css/superlist-mint.css' : 'wp-content/themes/superlist/assets/scss/superlist-mint.scss'
				}
			}
		},
		watch: {
			css: {
				files: '**/**/**/**/*.scss',
				tasks: ['sass']
			}
		}
	});
	grunt.loadNpmTasks('grunt-contrib-sass');
	grunt.loadNpmTasks('grunt-contrib-watch');
	grunt.registerTask('default',['watch']);
}

However, the SCSS is not updating.

Any ideas what I have wrong?

thanks!