KVM installation hangs on `can't find '/boot/entropy`

jseppa01

I'm trying to install pfSense with the memstick-serial version into Centos 8 libvirt/KVM using the following command:

          virt-install \
            --connect qemu:///system \
            --name pfsense1 \
            --virt-type kvm \
            --hvm \
            --ram=2048 \
            --vcpus=2 \
            --cpu=kvm64 \
            --console pty,target_type=serial \
            --network bridge=br0 \
            --network bridge=br0 \
            --network bridge=br0 \
            --os-type=freebsd \
            --os-variant=freebsd12.0 \
            --disk format=raw,readonly=on,path=/home/images/pfSense-CE-memstick-serial-2.5.2-RELEASE-amd64.img \
            --boot hd \
            --disk path=/home/kvms/pfsense1.qcow2,size=10 \
            --graphics none \
            --noautoconsole

Unfortunately the install hangs at:

/          __
    _ __  / _|___  ___ _ __  ___  ___
   | '_ \| |_/ __|/ _ \ '_ \/ __|/ _ \
   | |_) |  _\__ \  __/ | | \__ \  __/
   | .__/|_| |___/\___|_| |_|___/\___|
   |_|


 +-----------Welcome to pfSense------------+      __________________________
 |                                         |     /                       ___\
 |  1. Boot Multi user [Enter]             |    |                      /`
 |  2. Boot Single user                    |    |                     /    :-|
 |  3. Escape to loader prompt             |    |      _________  ___/    /_ |
 |  4. Reboot                              |    |    /` ____   / /__    ___/ |
 |  5. Cons: Dual (Serial primary)         |    |   /  /   /  /    /   /     |
 |                                         |    |  /  /___/  /    /   /      |
 |  Options:                               |    | /   ______/    /   /       |
 |  6. Kernel: default/kernel (1 of 1)     |    |/   /          /   /        |
 |  7. Boot Options                        |        /          /___/         |
 |                                         |       /                         |
 |                                         |      /_________________________/
 +-----------------------------------------+                                  |
   Autoboot in 0 seconds, hit [Enter] to boot or any other key to stop

Loading kernel...
/boot/kernel/kernel text=0x1a5477c data=0x140 data=0x1b61790 syms=[0x8+0x1c0f38+0x8+0x1c7041]
Loading configured modules...
can't find '/etc/hostid'
can't find '/boot/entropy'
\

Any tips on getting around this issue would be appreciated. Cheers