this script automaticly installs the repo without any interaction
curl https://debian.sys2nix.de/install.sh | bash
curl -s --compressed "https://debian.sys2nix.de/KEY.gpg" | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/mrp.gpg >/dev/null
sudo curl -s --compressed -o /etc/apt/sources.list.d/mrp.list "https://debian.sys2nix.de/mrp.list"
sudo apt update