Vagrant Environment, laravel5.1 installation Laravel Elixir not succeed?

Follow the Documentation tutorial steps:
[Laravel 5.1 documentation] service--laravel Elixir

Development environment is, window under the vagrant Environment, node and gulp are installed, in the third step error
Thought it was a high-wall problem, agent went out to operate once or did not succeed
The following commands have been tried:

npm install --no-bin-links

sudo npm install --no-bin-links

Reply content:

Follow the Documentation tutorial steps:
[Laravel 5.1 documentation] service--laravel Elixir

Development environment is, window under the vagrant Environment, node and gulp are installed, in the third step error
Thought it was a high-wall problem, agent went out to operate once or did not succeed
The following commands have been tried:

npm install --no-bin-links

sudo npm install --no-bin-links

