KetchupLand's fork of the Minetest voxel engine.
Building Minetest-KetchupLand is very similar to building Minetest, but you will need to clone the KetchupLand game into games/. If you're running in place, you can do this by running the following command:
git clone --depth 1 https://github.com/KetchupLand/KetchupLand games/ketchupland
The rest of the instructions are identical to Minetest, see README-minetest.md.