This is now the fix, which I tested using a loop device. Also works with a /boot/efi partition.
https://github.com/faiproject/fai/commit/d120c26c788b13b83f60f3bd1f3f5feb65cc7a55 Example: disk_config disk1 disklabel:gpt fstabkey:uuid align-at:1M primary /boot 64M vfat rw primary / 40- ext4 defaults primary swap 10 swap sw --- # disk_var.sh as YAML ESP_DEVICE: /dev/loop0p1 SWAPLIST: /dev/loop0p3 ROOT_PARTITION: UUID=cd6aa710-56d4-439a-bf4d-0baa29cc15d8 BOOT_PARTITION: /dev/loop0p1 BOOT_DEVICE: /dev/loop0 -- regards Thomas

