{
  pkgs ? (import <nixpkgs> { }),
  lib ? pkgs.lib,
}:
let
  base-cmd = vm: ''
    ${pkgs.qemu}/bin/qemu-system-x86_64 -m 4G \
            -kernel ${vm.kernel}/bzImage \
            -initrd ${vm.ramdisk}/initrd \
            -append "init=${vm.toplevel}/init loglevel=4 console=ttyS0" \
            -display none -serial mon:stdio
  '';

  border-vm =
    (import (pkgs.path + "/nixos/lib/eval-config.nix") {
      system = "x86_64-linux";
      modules = [
        ./border.nix
        ./vm-base.nix
      ];
    }).config.system.build;

  client-vm =
    (import (pkgs.path + "/nixos/lib/eval-config.nix") {
      system = "x86_64-linux";
      modules = [
        ./client.nix
        ./vm-base.nix
      ];
    }).config.system.build;

  border-launch = pkgs.writeShellScript "lauch-border" ''
    ${base-cmd border-vm}
  '';

  client-launch = pkgs.writeShellScript "lauch-client" ''
    ${base-cmd client-vm}
  '';
in
{ }