   grunt.initConfig
     pkg: grunt.file.readJSON 'package.json'
     clean:
+      all:
+        expand: true
+        cwd: buildDir
+        src: '**/*'
       js:
         expand: true
         cwd: buildDir

        tasks: 'copy:package'

  grunt.registerTask 'run', 'Run the application.', ['shell:run']

  grunt.event.on 'watch', (action, path, target) ->
    relativePath = removePathPrefix(sourceDir, path)

        cwd: buildDir
        src: '**/*.html'
    coffee:
      options:
        sourceMap: true
      build:
        expand: true
        cwd: sourceDir
