$ sudo apt-get update
$ sudo apt-get install minetest-mod-moreblocks 

minetest-mod-moreblocks is installed in your system.

Make ensure the minetest-mod-moreblocks package were installed using the commands given below,

$ sudo dpkg-query -l | grep minetest-mod-moreblocks *

You will get with minetest-mod-moreblocks package name, version, architecture and description in a table

minetest-mod-moreblocks package basic information: