Carbone-cc (Carbone-carboncopy) is a fork of carbone-ng. It is a subgame for Minetest. Carbone-cc was created by mawaway and can be found here.
Go to games/ directory, then clone this repository: git clone https://github.com/mawaway/carbone-cc.git
If you want the latest features, pull from the dev branch: git pull origin dev
The Minetest Engine can be found in: https://github.com/minetest/minetest/