nix-conf/system/virt.nix

{config, ...}: {
  virtualisation.containers.enable = config.u.has.container;
  virtualisation = {
    podman = {
      enable = config.u.has.container;
      dockerCompat = true;
      defaultNetwork.settings.dns_enabled = true;
    };
  };
  virtualisation.libvirtd.enable = config.u.has.virt;
  programs.virt-manager.enable = config.u.has.graphical && config.u.has.virt;
  programs.nix-ld.enable = true;
  hardware.graphics.enable32Bit = config.u.has.graphical && config.u.has.wine;
}