one additional note, kiwi uses the '_' as placeholder for the directory structure if no mountpoint is specified. This causes trouble if the name of the volume contains '_' Along with this fix a runtime check will be provided which checks this For you this means you should change at least the 'x86_64-efi' volume to this entry <volume name="x86_64_efi" mountpoint="boot/grub2/x86_64-efi"/> name can be anything that way.