nixos-fs

sudo cryptsetup --key-size 512 --hash sha512 luksFormat /dev/sda2
sudo cryptsetup luksOpen /dev/sda2 root
sudo pvcreate /dev/mapper/root
sudo vgcreate vg /dev/mapper/root
sudo lvcreate -n swap -L 8G vg
sudo lvcreate -n root -l +100%FREE vg
sudo mkfs.vfat -F32 -n boot /dev/sda1
sudo mkfs.ext4 -L root /dev/mapper/vg-root
sudo mkswap -L swap /dev/mapper/vg-swap
sudo swapon /dev/mapper/vg-swap
sudo mount /dev/mapper/vg-root /mnt
sudo mkdir -p /mnt/boot
sudo mount -o umask=0077 /dev/sda1 /mnt/boot

sudo nixos-generate-config --root /mnt
sudo nixos-install