Qemu additional cd mounting an iso

I’m using the qemu builder to build windows vms. As you may know in order to run properly and install the OS the virtio driver are needed. Right now I’m mounting the iso locally, extracting the driver I need and use a local drivers folder and then cd_files = [ "drivers/*" ] set in the source block of the packer build.

I was wondering if there was a way to just say cd_iso = virtio.iso or a more generic cd_isos = [...]

Is something similar supported by some other builder that I can use as a reference to try and implement this in the qemu plugin itself?