[2498] [Global css] Different css files for the same node module are ignored

Hi.

This is my global css setting in nuxt.config.js:

{
 head...,
 css: [
    'mint-ui/lib/loadmore/style.css',
    'mint-ui/lib/datetime-picker/style.css',
    'mint-ui/lib/popup/style.css',
    'mint-ui/lib/picker/style.css',
    'mint-ui/lib/search/style.css',
    '~/assets/main.css',
  ],
 build...
}

After run build && run start, open the page in the browser, then, I found that in addition to the first css, the other is not injected.

// Unpackaged css files
'mint-ui/lib/datetime-picker/style.css',
'mint-ui/lib/popup/style.css',
'mint-ui/lib/picker/style.css',
'mint-ui/lib/search/style.css',

This is my first time using nuxt.js, do I omit some settings?

"mint-ui": "^2.2.13",
"nuxt": "^1.0.0-rc11",