nixos btrfs install history for automating later

    1  export $dev=/dev/nvme0n1 
    2  export dev=/dev/nvme0n1 
    3  gdisk $dev
    5  cryptsetup luksFormat "$dev"p3
    6  cryptsetup open "$dev"p3 enc
    7  mkfs.vfat -n boot "$dev"p1
    8  mkswap "$dev"p2
    9  swapon "$dev"p2
   11  mkfs.btrfs -L root /dev/mapper/enc
   13  mount -t btrfs /dev/mapper/enc /mnt/
   14  btrfs subvol create /mnt/nixos
   15  umount /mnt
   20  mount -t btrfs -o subvol=nixos,compress=zstd,noatime /dev/mapper/enc /mnt
   21  btrfs subvolume create /mnt/home
   22  btrfs subvolume create /mnt/tmp
   23  mkdir /mnt/boot
   24  mount "$dev"p1 /mnt/boot
   25  nixos-generate-config --root /mnt
   27  vim /mnt/etc/nixos/configuration.nix 
   28  nixos-install