Going through some meteor libraries, I notice that npm install and meteor npm install are both used in instructions. I know Meteor 1.3
npm install
meteor npm install
Meteor 1.3
meteor npm will run npm that has been bundled with meteor, this may be a different version than the version of npm installed globally on your system.
meteor npm
You can check versions like meteor npm -v and npm -v
meteor npm -v
npm -v