Cannot find module

在执行npm run dev时报下面的错误,但这所有的依赖我都已经下载

``` javascript
Uncaught Error: Cannot find module "!!./../../node_modules/css-loader/index.js!./../../node_modules/vue-loader/lib/style-rewriter.js?id=_v-cee506ee&file=App.vue!./../../node_modules/stylus-loader/index.js!./../../node_modules/vue-loader/lib/selector.js?type=style&index=0!./App.vue"
```

环境：
win7 
node v5.1.1 
npm v3.5.1
