vm-test2.nix

gistfile1.txt

let  pkgs = import <nixpkgs> {};
  config = (import <nixpkgs/nixos/lib/eval-config.nix> {
    system=pkgs.system;
    modules = [ {
      fileSystems."/".device = "/dev/disk/by-label/nixos";

      boot.loader.grub.version = 2;
      boot.loader.grub.device = "/dev/sda";
      boot.loader.timeout = 0;

      services.openssh.enable = true;
      services.openssh.startWhenNeeded = false;
      services.openssh.extraConfig = "UseDNS no";
    } ];
  }).config;
in
import <nixpkgs/nixos/lib/make-disk-image.nix> {
    name = "libvirtd-ssh-image";
    format = "qcow2";
    diskSize = 800;
    config = config;
    contents = [{
      source = (pkgs.writeText "aaaa" "bbb");
      target = "/etc/ssh/authorized_keys.d/root";
    }];
    lib=pkgs.lib;
    inherit pkgs;
    }