In packer, when using "type": "virtualbox-ovf" it is possible to define a base ova using:
"source_path": "file://{{user `pwd`}}/server-base.ova",
This option does not seem to be available when building with "type": "vmware-iso"
Is there an alternative way for building with VMWare provider, starting from a base .ova?
Use
vmware-vmx. If you have an OVA, useovftoolto convert it before running Packer.