nix/sd-image.nix

# Raspberry Pi SD Image
# $ nix-build '<nixpkgs/nixos>' -A config.system.build.sdImage -I nixos-config=./sd-image.nix
# https://nixos.wiki/wiki/NixOS_on_ARM#Installation
{ config, lib, ... }: 
let
  desktop = null;
in {
  # Simple bootstrap SD image for the Raspberry Pi
  imports = [
    <nixpkgs/nixos/modules/installer/sd-card/sd-image-aarch64.nix>
  ];

  users.users.albert = {
    isNormalUser = true;
    description = "Albert J. Copeland";
    extraGroups = [ "networkmanager" "wheel" ];
    # mkpasswd -m sha-512
    hashedPassword = "$y$j9T$wKLsIWaA4Gf63RvjedwLJ0$EHKL6BBJV0CAxEKcHHjaBqW085KJ/MGvmbyWzmcWOy6";
  };

  services.openssh = {
    enable = true;
    settings = {
      PermitRootLogin = "no";
      PasswordAuthentication = true;
    };
  };
}