Compatibility issue with Packages based Architecture

[anothermohit]

Hi,

I am trying to use Phantomjs. It works perfectly fine if I install it directly in my Meteor directory following these steps - http://stackoverflow.com/a/28125219/4382567

But I am not able to get it to work when keeping this code in a separate local package.

Here is what I am doing:
I have set the dependency of my package on meteorhacks:npm (and tried npm-container too) and keeping the packages.json file in the root path of my package.

The error I am getting:
ReferenceError: require is not defined (at var page = require('webpage').create(); )

Can anyone please tell me how to resolve this?