Vue.js 2.0模块构建失败：SyntaxError：使用webpack，Elixir和gulp的意外令牌

花了差不多完整的一天尝试从Vue.js 1.X升级到Vue.js 2.0我仍然得到错误（使用gulp Watch ）

错误在./~/buble-loader!./~/vue-loader/lib/selector.js?type=script&index=0!./resources/assets/js/components/example/example.vue模块构建失败： SyntaxError：Parser.pp $ 4.raise（/home/vagrant/Projects/test/node_modules/acorn/dist/acorn.js:2221:15）Parser.pp.unexpected（/ home /）中的意外标记（41:79） vagans / Projects / test / node_modules / acorn / dist / acorn.js：603：10）at Parser.pp $ 3.parseExprAtom（/home/vagrant/Projects/test/node_modules/acorn/dist/acorn.js:1822:12 ）在Parser.parseExprAtom（/home/vagrant/Projects/test/node_modules/buble/dist/buble.umd.js:656:26）at Parser.pp $ 3.parseExprSubscripts（/ home / vagrant / Projects / test / node_modules /） acorn / dist / acorn.js：1715：21）at Parser.pp $ 3.parseMaybeUnary（/home/vagrant/Projects/test/node_modules/acorn/dist/acorn.js:1692:19）at Parser.pp $ 3.parseExprOps （/home/vagrant/Projects/test/node_modules/acorn/dist/acorn.js:1637:21）在Parser.pp $ 3.parseMaybeConditional（/home/vagrant/Projects/test/node_modules/acorn/dist/acorn.js） ：1620：21）在Parser . Parser.pp $ 3.parseMaybeAssign（/ home / test /Projects / test / node_modules / acorn /acorn.js:1608:25）@ ./resources/assets/js/components/example/exmple.vue 7：18-107 @ ./~/buble-loader!./~/vue-loader/lib/selector .js？type = script＆index = 0！./ resources / assets / js / components / example / exampleParent.vue @ ./resources/assets/js/components/example/exampleParent.vue @ ./resources/assets/js/app .js文件

我尝试多次安装，现在以下面的包结束

{
  "private": true,
  "scripts": {
    "prod": "gulp --production",
    "dev": "gulp watch"
  },
  "dependencies": {
    "babel-core": "^6.18.0",
    "babel-loader": "^6.2.7",
    "babel-plugin-transform-runtime": "^6.15.0",
    "babel-runtime": "^6.18.0",
    "bootstrap": "^3.3.7",
    "bootstrap-switch": "^3.3.2",
    "css-loader": "^0.25.0",
    "lodash": "^4.14.0",
    "vue": "^2.0.3",
    "vue-hot-reload-api": "^2.0.6",
    "vue-html-loader": "^1.2.3",
    "vue-loader": "^9.7.0",
    "vue-resource": "^1.0.3",
    "vue-strap": "^1.1.18"
  },
  "devDependencies": {
    "babel-preset-es2015": "6.9.0",
    "bootstrap-sass": "^3.3.7",
    "gulp": "^3.9.1",
    "install": "^0.8.2",
    "laravel-elixir": "^6.0.0-9",
    "laravel-elixir-vue-2": "^0.2.0",
    "laravel-elixir-webpack-official": "^1.0.9",
    "npm": "^3.10.9",
    "vue-router": "^2.0.1"
  }
}

我的gulpfile看起来像

const elixir = require('laravel-elixir');

require('laravel-elixir-vue-2');

elixir(mix => {
    mix.sass('app.scss')
        .webpack('app.js')
        .webpack('backend.js')
       //  other stuff. . .  //
}

有什么问题 ？如何解决这些重复错误？