{ config, lib, pkgs, ... }: with lib; let cfg = config.mySystem.dev.qemu; in { options.mySystem.dev.qemu.enable = mkEnableOption "Enable QEMU"; config = mkIf cfg.enable { environment.systemPackages = with pkgs; [ qemu virt-manager ]; systemd.tmpfiles.rules = ["L+ /var/lib/qemu/firmware - - - - ${pkgs.qemu}/share/qemu/firmware"]; boot.binfmt.emulatedSystems = ["aarch64-linux"]; }; }