You can programtically register these package providers: https://github.com/Larask/gist/blob/master/app/Providers/AppServiceProvider.php#L40-L44
if ($this->app->environment() == 'local') {
$this->app->register('Barryvdh\LaravelIdeHelper\IdeHelperServiceProvider');
$this->app->register('Laracasts\Generators\GeneratorsServiceProvider');
$this->app->register('Barryvdh\Debugbar\ServiceProvider');
}