pkgs = import <nixpkgs> {};
lib = pkgs.lib;
dom0_config = { pkgs, ... }:
{
  virtualisation.xen = {
    enable = true;
    bootParams = [ "loglvl=all guest_loglvl=all com1=38400,8n1 console=com1" ];
   };
  fileSystems = {
    "/" = { device = "LABEL=nixos"; fsType = "ext4"; };
    "/stuff" = { device = "/dev/sdb"; fsType = "ext4"; autoFormat = true; };
  };
  boot = {
    loader.grub = {
      enable = true;
      device = "/dev/vda";
    };
    kernelParams = [ "console=hvc0 earlyprintk=xen" ];
  };
  services.mingetty.autologinUser = "root";
  systemd.services.xentest = {
    after = [ "xen-bridge.service" "xen-qemu.service" ];
    description = "xen automated testing";
    wantedBy = [ "multi-user.target" ];
    path = with pkgs; [ xen e2fsprogs utillinux ];
    script = ''
      exec > /dev/hvc0 2>&1
      xl list
      touch /stuff/stuff
      #shutdown -h now
    '';
  };
};
dom0_build = import <nixpkgs/nixos> { configuration = dom0_config; };
rootDisk = import <nixpkgs/nixos/lib/make-disk-image.nix> {
  # ~5mins to build
  name = "xen-rootfs";
  inherit pkgs lib;
  config = dom0_build.config;
  partitioned = true;
  installBootLoader = true;
  diskSize = 4096;
  fixValidity = false;
};
rootDisk;