NixOS Iso with SSH

build.sh

nix build .#nixosConfigurations.machineIso.config.system.build.isoImage
ls result/iso/                                                                                                        
# nixos-23.05.20231106.41de143-x86_64-linux.iso

flake.nix

{
  outputs = { self, nixpkgs }: {
    nixosConfigurations.machineIso = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      modules = [
        #./machine.nix
        (nixpkgs
          + "/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix")
        (nixpkgs + "/nixos/modules/installer/cd-dvd/channel.nix")
        ({ pkgs, ... }: {
          # Enable SSH in the boot process.
          systemd.services.sshd.wantedBy =
            pkgs.lib.mkForce [ "multi-user.target" ];
          users.users.root.openssh.authorizedKeys.keys = [
            # your ssh key
            "ssh-ed25519 AaAeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee username@host"
          ];
          isoImage.squashfsCompression = "gzip -Xcompression-level 1";
          networking = {
            usePredictableInterfaceNames = false;
	          useDHCP = true;
            nameservers = [ "8.8.8.8" ];
          };
        })
      ];
    };
  };
}