Again, until the package's issues can be cleaned up, it appears @devguy's answer is the best interim workaround:

Install base files; .postinst fails; libdvdcss package NOT installed
sudo apt-get install libdvd-pkg
Re-run .postinst; libdvdcss package successfully builds and installs
sudo dpkg-reconfigure libdvd-pkg

Tasksel is an easy-to-use tool that provides an interface to install a group of software packages such as LAMP, Mail Server, DNS, etc. in Ubuntu and Debian.

Upt est un outil qui unifie les commandes de gestion de paquets pour différents systèmes Linux et Unix, permettant d’utiliser une syntaxe commune pour installer, mettre à jour ou supprimer des paquets.
cargo install upt