To calculate the UUID in `root-uuid`, the operating-system has to have a root
file system, because it's typically used in the
operating-system-boot-parameters.
Followup of efc32c6684 that it partially reverts.
* gnu/system/image.scm (operating-system-for-image): Re-introduce root file
system to operating-system used to calculate the UUID.
Fixes: #5131
Reported-By: Yelninei <yelninei@tutamail.com>
Change-Id: Ica2c3d3715cd90fccf3a7484f390b36de3cdfe7f
Signed-off-by: Rutherther <rutherther@ditigal.xyz>
Merges: #5141
Signed-off-by: Rutherther <rutherther@ditigal.xyz>