$ sudo apt-get update
$ sudo apt-get install partman-btrfs 

partman-btrfs is installed in your system.

Make ensure the partman-btrfs package were installed using the commands given below,

$ sudo dpkg-query -l | grep partman-btrfs *

You will get with partman-btrfs package name, version, architecture and description in a table

partman-btrfs package basic information: