Want to modify local meteor package

In Meteor 1.3, say I have installed local package using command meteor meteor add nicolaslopezj:mrf, I am getting some error saying “Uncaught ReferenceError: DotObject is not defined” and want to tweak some changes in that package. But I can’t find any subdirectory named “packages” within my root project directory (looked into .meteor as well).

Alternately, is there a way that I can save that package in my project folder? Has anyone tried this?

A package directory is not created by default, but you can simply create it yourself and use that to override packages with local copies.

I was able to fork an atmosphere package and modify it using this approach:
http://stackoverflow.com/a/27992252/1406028
I can confirm that it worked on Meteor 1.3, Windows 7, and Galaxy.