How to change the postCSS parser in Nuxt.js?

Question

Preprocessors

I have styles written in Sass, postCSS throws exceptions without a parser, but none of the examples from the Nuxt.js/Vue-Loader documentation work.
Does Nuxt even know how to change the parser for PostCSS?

build: {
    postcss: {
      parser: 'postcss-scss'
    },
    /*
    ** Run ESLint on save
    */
    extend (config, { isDev, isClient }) {
      if (isDev && isClient) {
        config.module.rules.push({
          enforce: 'pre',
          test: /\.(js|vue)$/,
          loader: 'eslint-loader',
          exclude: /(node_modules)/
        })
      }
    }
  }

Requires support for the following construct
| - root
| - assets
| - | -common.sass
| - pages
| - | - index.vue
common.sass

.link
  color: red

index.vue

<template lang="pug">
  a.localLink Link
</template>

<style lang="sass">
.localLink
  composes: link from "../assets/common.sass"
</style>

sass loader and parser installed

"devDependencies": {
    "babel-eslint": "^8.2.1",
    "eslint": "^4.15.0",
    "eslint-friendly-formatter": "^3.0.0",
    "eslint-loader": "^1.7.1",
    "eslint-plugin-vue": "^4.0.0",
    "node-sass": "^4.7.2",
    "postcss-scss": "^1.0.3",
    "sass-loader": "^6.0.6"

Now this construction causes the following errors (most likely due to the parser)

---

Answer 1

build: {
        /*
         ** Run ESLint on save
         */
        extend(config, {isDev, isClient}) {
            if (isDev && isClient) {
                config.module.rules.push({
                    enforce: 'pre',
                    test: /\.(js|vue)$/,
                    loader: 'eslint-loader',
                    exclude: /(node_modules)/
                })
            }
        },
        parser: [require('postcss-scss')],
        postcss: [
            require('import-postcss')(),
            require('postcss-cssnext')(),
            require('postcss-custom-media')(),
            require('postcss-node-sass')(),

        ],
        extractCSS: true
    },