NixOS-Config/hosts/lacros/system/boot/default.nix

{ ... }:
{
  boot = {
    kernelPackages = pkgs.linuxPackages_latest;
    kernel.sysctl."vm.max_map_count" = 2147483642;       
    initrd = {
      systemd.enable = true;
      luks.devices = {
        crypt-mmc = {
          device = "/dev/disk/by-uuid/5906e176-7ad3-41e5-bc45-ae65664eb10c";
          preLVM = true;
          allowDiscards = true;
        };
      };
    };
  };
}