If you clone latest relaese 2.0.0 and try to do npm install, no node_modules folder is created. I spent an hour to solve this.
If you do npm list it complains about invalid version number "2.0"
This warning causes npm to not install any modules without throwing an error or any hint.

To resolve this, I changed the version number in package.json to "2.0.0"

Now npm install runs smoothly :-)