How to install vuetify 2.0 beta to the new vue cli project?

After creating a new fresh vue project follow those commands:

# yarn
$ yarn add https://github.com/vuetifyjs/vue-cli-plugin-vuetify.git#dev -D
$ vue invoke vuetify

# npm
$ npm install https://github.com/vuetifyjs/vue-cli-plugin-vuetify.git#dev --save-dev
$ vue invoke vuetify

I think it will even work with the project you have already created. Just try the commands above.

For more check v2.0.0-beta.0 release

Don't include .styl files, it's deprecated basically.
Remove node-sass and install sass

$ npm uninstall node-sass
$ npm i -D sass

And modify your plugins/vuetify.js file

import Vue from 'vue'
import Vuetify from 'vuetify'


Vue.use(Vuetify)
export default new Vuetify({ theme: { ... } })

And main.js

new Vue({
  ...
  vuetify, // we add vuetify here
  render: (h) => h(App),
}).$mount('#app')

Note theme options changed in v2, dark theme can now be customized, e.g.

theme: {
  dark: true,
  themes: {
    light: {
      primary: '#42a5f5',
      //...
    },
    dark: {
      primary: '#2196F3.
    },
  },
},
options: {
  customProperties: true,
},
icons: {
  iconfont: 'md', // default is 'mdi'
}

More in docs, and new style docs with regards to sass.