These are the commands that I've been using. Not sure if I'm doing this right though.

apt install -y acpica-tools
acpidump > acpidump.out
acpixtract -a acpidump.out
iasl -d dsdt.dat
OEM_ID=$(grep "OEM ID" dsdt.dsl | tail -n 1 | awk -F'"' '{print $2}' | cut -c1-4)
sed -i "s/'<WOOT>'/'$OEM_ID'/g" /opt/CAPEv2/installer/kvm-qemu.sh