Fatal error: EACCES, readdir XXX about grunt-contrib-watch HOT 9 CLOSED

/*global module:false*/
module.exports = function(grunt) {

  // Project configuration.
  grunt.initConfig({
    // Metadata.
    pkg: grunt.file.readJSON('package.json'),
    banner: '/*! <%= pkg.title || pkg.name %> - v<%= pkg.version %> - ' +
      '<%= grunt.template.today("yyyy-mm-dd") %>\n' +
      '<%= pkg.homepage ? "* " + pkg.homepage + "\\n" : "" %>' +
      '* Copyright (c) <%= grunt.template.today("yyyy") %> <%= pkg.author.name %>;' +
      ' Licensed <%= _.pluck(pkg.licenses, "type").join(", ") %> */\n',
    // Task configuration.
    concat: {
      options: {
        banner: '<%= banner %>',
        stripBanners: true
      },
      dist: {
        src: ['js/src/**/*.js'],
        dest: 'js/build/<%= pkg.name %>.js'
      }
    },
    uglify: {
      options: {
        banner: '<%= banner %>'
      },
      dist: {
        src: '<%= concat.dist.dest %>',
        dest: 'js/build/<%= pkg.name %>.min.js'
      }
    },
    jshint: {
      options: {
        curly: true,
        eqeqeq: true,
        immed: true,
        latedef: true,
        newcap: true,
        noarg: true,
        sub: true,
        undef: true,
        unused: true,
        boss: true,
        eqnull: true,
        browser: true,
        globals: {}
      },
      gruntfile: {
        src: 'Gruntfile.js'
      },
      lib_test: {
        src: ['lib/**/*.js', 'test/**/*.js']
      }
    },
    // qunit: {
    //   files: ['test/**/*.html']
    // },
    watch: {
      gruntfile: {
        files: '<%= jshint.gruntfile.src %>',
        tasks: ['jshint:gruntfile']
      },
      lib_test: {
        files: '<%= jshint.lib_test.src %>',
        tasks: ['jshint:lib_test'/*, 'qunit'*/]
      },
      styles: {
        files: '<%= compass.compile.sassDir %>/**/*.scss',
        tasks: ['compass:dev']
      }
    },
    compass: {
      compile: {
        options: {
          sassDir: 'scss',
          cssDir: 'styles',
          specify: ['scss/landing.scss', 'scss/login.scss', 'scss/app.scss'],
          imagesDir: 'images',
          environment: 'production',
          outputStyle: 'compressed',
          relativeAssets: true,
          force: true
        }
      },
      dev: {
        options: {
          sassDir: '<%= compass.compile.sassDir %>',
          cssDir: '<%= compass.compile.cssDir %>',
          specify: '<%= compass.compile.specify %>',
          imagesDir: '<%= compass.compile.imagesDir %>',
          environment: 'development',
          outputStyle: 'compact',
          relativeAssets: true,
          debugInfo: true,
          force: true
        }
      }
    }
  });

  // These plugins provide necessary tasks.
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  // grunt.loadNpmTasks('grunt-contrib-nodeunit');
  grunt.loadNpmTasks('grunt-contrib-jshint');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-contrib-compass');

  // Default task.
  grunt.registerTask('default', ['jshint', /*'qunit',*/ 'concat', 'uglify', 'compass:compile']);

};