{ ... }: {

    flake.nixosModules.default = { config, lib, pkgs, ... }: {

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

        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
            ];
        };
    };
}