第四章中,Mac 下 NPM run dev 报错问题还是解决不了，搞定的来帮个忙呗 ？

在进入第四章第 2 节时，Mac 环境下，在删除了 package.json 中 script 里的 cross-env 后执行 npm run dev 命令的时候依然报错，报错信息为：

    > @ dev /home/vagrant/Code/sample
    > npm run development

    > @ development /home/vagrant/Code/sample
    > NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js

    sh: 1: node_modules/webpack/bin/webpack.js: Permission denied
    npm ERR! code ELIFECYCLE
    npm ERR! errno 126
    npm ERR! @ development: `NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js`
    npm ERR! Exit status 126
    npm ERR!
    npm ERR! Failed at the @ development script.
    npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

    npm ERR! A complete log of this run can be found in:
    npm ERR!     /home/vagrant/.npm/_logs/2017-09-16T09_59_39_971Z-debug.log
    npm ERR! code ELIFECYCLE
    npm ERR! errno 126
    npm ERR! @ dev: `npm run development`
    npm ERR! Exit status 126
    npm ERR!
    npm ERR! Failed at the @ dev script.
    npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

    npm ERR! A complete log of this run can be found in:
    npm ERR!     /home/vagrant/.npm/_logs/2017-09-16T09_59_40_006Z-debug.log

我的 package.json 文件已经改成了：

{
    "private": true,
    "scripts": {
        "dev": "npm run development",
        "development": "NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
        "watch": "NODE_ENV=development node_modules/webpack/bin/webpack.js --watch --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
        "watch-poll": "npm run watch -- --watch-poll",
        "hot": "NODE_ENV=development node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js",
        "prod": "npm run production",
        "production": "NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
    },
    "devDependencies": {
        "axios": "^0.16.2",
        "bootstrap-sass": "^3.3.7",
        "cross-env": "^5.0.1",
        "jquery": "^3.1.1",
        "laravel-mix": "^1.0",
        "lodash": "^4.17.4",
        "vue": "^2.1.10"
    }
}

并没有像有些人说的改了 json 再执行就会可以，有人知道解决办法吗？谢谢。