You can access the packages by adding the lines below to a file such as /etc/apt//: Versionĭeb buster mainĭeb-src buster mainĭeb bullseye mainĭeb-src bullseye main Sudo wget -O /usr/share/keyrings/gpg-pub-moritzbunkus.gpg You first have to import my public GPG key because all of my pools are signed. I provide i386 and Amd64 binaries for MKVToolNix for Debian 10 'Buster' (the current stable) and 11 'Bullseye' (the upcoming stable).