{
  config,
  lib,
  options,
  pkgs,
  ...
}: let
  cfg = config.traits.containers;
in {
  options.traits.containers = {
    enable = lib.mkEnableOption "containers support";
  };

  config.virtualisation = lib.mkMerge [
    (lib.mkIf cfg.enable {
      podman = {
        enable = true;
        extraPackages = with pkgs; [podman-compose];
        autoPrune.enable = true;
      };

      oci-containers.backend = "podman";
    })

    (let
      enable = lib.mkDefault (
        lib.elem "nvidia" (config.services.xserver.videoDrivers or [])
      );
    in
      if (options.virtualisation.containers ? cdi)
      then {
        containers.cdi.dynamic.nvidia = {inherit enable;};
      }
      else {
        podman.enableNvidia = enable;
      })
  ];
}