'ERROR guestfs can't be launched' when trying to compare Qubes ISOs

This bug was originally reported by Holger Levsen (holger@layer-acht.org) in Debian bug #837681:

Package: diffoscope
Version: 60
Severity: normal

Hi,

so I build an Qubes ISO, twice and ran diffoscope against it:

[..]

Am I missing some dependencies or what does that mean and what should I do =
now?


--=20
cheers,
	Holger