I am trying to use Gulp and Node.Js to stream my process for minifying and concatenating CSS/JS files for production.
Here is what I have done.
You need to make sure, when you run command (install npm -g gulp), it will create install gulp on C:\ directory.
that directory should match with whatver npm path variable set in your java path.
just run path from command prompt, and verify this. if not, change your java class path variable wherever you gulp is instaled.
It should work.