Start job for root partition times out

[PhysicsIsAwesome]

mkosi.local.conf:

[Distribution]
Distribution=arch

[Config]
Profiles=desktop,gnome,obs

[Validation]
SecureBootKey=../mkosi.key
SecureBootCertificate=../mkosi.crt
SignExpectedPcrKey=../mkosi.key
SignExpectedPcrCertificate=../mkosi.crt
VerityKey=../mkosi.key
VerityCertificate=../mkosi.crt

Built with mkosi -B -f on Fedora 42 KDE with mkosi 26-devel installed through OBS package. Then burned to a virtual hdd with mkosi burn /dev/vda. Booted from this virtual hdd in a new VM with virtual tpm and ran systemd-repart --dry-run=no --empty=force --defer-partitions=swap,root,home /dev/vdb. Reboot into dev/vdb, selected first entry (Arch) then I got these errors:

FAILED to start Repartitioning Root Disk
and
Timed out waiting for device /dev/disk/by-desinator/root

[TriMoon]

This is most likely, IMHO, due to wrong partition-type for the root partition. check if it is properly set as one of the "Linux root (xxxx)" partitions instead of the default "Linux filesystem" partition-type.

• fe. Linux root (x86-64) === 4F68BCE3-E8CD-4DB1-96E7-FBCAF984B709