2023
https://itsfoss.com/things-to-do-after-installing-nixos/
    ! #4
    ! service.flatpak.enable=true;
https://itsfoss.com/nixos-package-management/
    ! #3
https://itsfoss.com/install-nixos-vm/
    ! #2
https://itsfoss.com/why-use-nixos/
    ! #1