use unionfs
overlay tool (+ debian12 build container that includes it) by default
#26
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Follow-up for:
eessi_container.sh
for usingunionfs
overlay tool #9As discussed during today's EESSI support sync meeting, let's change the default to use
unionfs
rather thanfuse-overlayfs
to create a writable overlay for building software to be ingested into EESSI.This should circumvent the problems we have with
fuse-overlayfs
when doing rebuilds, see also EESSI/software-layer#556 and EESSI/software-layer#1103