Laravel elixir vueify

لما بعمل require laravel-elixir-vueify بيحصل معايا error

/home/vagrant/Code/simple/node_modules/laravel-elixir-vueify/index.js:3
    Elixir.config.js.browserify.transformers.push({
                               ^

TypeError: Cannot read property \'transformers\' of undefined
    at Object.<anonymous> (/home/vagrant/Code/simple/node_modules/laravel-elixir                -vueify/index.js:3:32)
    at Module._compile (module.js:571:32)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:488:32)
    at tryModuleLoad (module.js:447:12)
    at Function.Module._load (module.js:439:3)
    at Module.require (module.js:498:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/home/vagrant/Code/simple/gulpfile.js:2:2)
    at Module._compile (module.js:571:32)

____________________________________________________
const elixir = require(\'laravel-elixir\');
require(\'laravel-elixir-vueify\');

elixir(function (mix) {
    mix.styles([
        \'bootstrap.css\',
        \'app.css\'
    ],\'public/css/style.css\');

    mix.scripts([
        \'jquery.js\',
        \'bootstrap.js\',
        \'app.js\'
    ],\'public/js/main.js\');
});