{ lib, ... }:

{
  _class = "nixos";

  ## FIXME: It would be nice, but the following leads to infinite recursion
  ## in the way we currently plug `sources` in.
  ##
  # imports = [
  #   "${sources.nixpkgs}/nixos/modules/profiles/qemu-guest.nix"
  # ];

  boot = {
    loader = {
      systemd-boot.enable = true;
      efi = {
        canTouchEfiVariables = true;
        efiSysMountPoint = "/boot";
      };
      grub.enable = false;
    };
    initrd = {
      availableKernelModules = [
        "ata_piix"
        "uhci_hcd"
        "sd_mod"
        "sr_mod"
      ];
      kernelModules = [ "dm-snapshot" ];
    };
  };

  fileSystems."/boot" = {
    fsType = "vfat";
    device = lib.mkDefault "/dev/sda1";
    options = [
      "fmask=0022"
      "dmask=0022"
    ];
  };

  disko.devices.disk.main = {
    device = "/dev/sda";
    type = "disk";
    imageSize = "20G"; # needed for image generation

    content = {
      type = "gpt";

      partitions = {
        # mbr = {
        #   priority = 0;
        #   size = "1M";
        #   type = "EF02";
        # };

        esp = {
          priority = 1;
          size = "500M";
          type = "EF00";
          label = "boot";
          content = {
            type = "filesystem";
            format = "vfat";
            mountpoint = "/boot";
          };
        };

        root = {
          priority = 2;
          size = "100%";
          content = {
            type = "filesystem";
            format = "ext4";
            mountpoint = "/";
          };
        };
      };
    };
  };
}