If someone ends up nuking "/var/lib/dpkg":
sudo mkdir -p /var/lib/dpkg/updates sudo mkdir -p /var/lib/dpkg/info sudo mkdir -p /var/lib/dpkg/alternatives sudo cp /var/backups/dpkg.status.0 /var/lib/dpkg/status sudo cp /var/backups/dpkg.statoverride.0 /var/lib/dpkg/statoverride sudo cp /var/backups/dpkg.diversions.0 /var/lib/dpkg/diversions sudo cp /var/backups/dpkg.arch.0 /var/lib/dpkg/arch sudo dpkg --clear-avail sudo apt update sudo apt upgrade # If needed.