How to modify/edit a Meteor package?

Question

I want to run two different Meteor apps on the same server (on different ports) but I want to change something in one of Meteor's core packages and I want one app to use the original package and the other app to use the modified one. How could I do it?

Answer 1

A bit more straightforward answer, based on answer from here :

1. Create packages folder in your project and change location to that folder ('cd yourproject' && 'mkdir packages' && 'cd packages')
2. Fetch files from git ('git clone https://github.com/YOUR_PACKAGE_ADDRESS' - you need to have git installed)
3. Inside fetched package folder find package.js and edit inside 'Package.describe' name value, for example by adding '-manually-modified'
4. Edit files you need to modify inside fetched package folder.
5. Add package to project (meteor add package-name-manually-modified)