How we can use libvirt builder in packer, currently using qemu bulder

I want to use libvirt builder in packer, so how we can use it as i already installed packer and libvirt packages. I have used packer for qemu plugin but due to some issue in qemu I want to move to libvirt .
When i am adding type: libvirt and libvirt_uri as qemu:///system in json file getting below error.

error initializing builder ‘libvirt’: Unknown builder libvirt

Can anyone help me out in this

@pravinjec55 Have you solved your problem?