{ config, lib, pkgs, ... }: {

    options.sysconfig.virtual-machines.enable = with lib; mkOption {
        type = with types; bool;
        default = false;
    };

    imports = let 
        dir = builtins.readDir ./.;
    in builtins.map (x: ./${x}) (builtins.filter 
        (file: (dir.${file} == "directory"))
        (builtins.attrNames dir)
    );

    config = lib.mkIf config.sysconfig.virtual-machines.enable {
        programs.virt-manager.enable = true;

        virtualisation = {
            libvirtd = {
                enable = true;
                qemu.swtpm.enable = true;
            };

            spiceUSBRedirection.enable = true;
        };

        environment.systemPackages = with pkgs; lib.mkIf config.sysconfig.graphical [
            virt-viewer
        ];
    };
}