https://nixos.org/manual/nixos/stable/index.html#sec-installation
https://nixos.org/manual/nixos/stable/index.html#sec-installation-manual-summary

https://nixos.org/manual/nixos/stable/index.html#sec-installation-manual-partitioning
    /dev/vda \
    mklabel gpt \
    mkpart primary 512MB -8GB \
    mkpart primary linux-swap -8GB 100% \
    mkpart ESP fat32 1MB 512MB \
    set 3 esp on
https://nixos.org/manual/nixos/stable/index.html#sec-installation-manual-partitioning-formatting
    mkfs.ext4 -L nixos /dev/sda1
    mkswap -L swap /dev/sda2
    mkfs.fat -F 32 -n boot /dev/sda3
https://nixos.org/manual/nixos/stable/index.html#sec-installation-manual-installing
    mount /dev/disk/by-label/nixos /mnt
    mkdir -p /mnt/boot
    mount /dev/disk/by-label/boot /mnt/boot
    swapon /dev/sda2
    nixos-generate-config --root /mnt
        ...
        # check the
        boot.loader.systemd-boot.enable = true; # (for UEFI systems only)
        ...
    nixos-install
    reboot