Created attachment 577074 [details] build.log Downgrading to 2.28 makes it build again.
did you try with a newer util-linux version?
I just tested 2.33.2 and it built fine.
I would stabilize the newer version then, @base-system, ok with that?
@ arches, please test and mark stable: =sys-apps/util-linux-2.33.2
x86 stable
sparc stable
hppa stable
amd64 stable
s390 stable
ppc64 stable
alpha stable
ppc stable
ia64 stable
arm stable
m68k stable
sh stable
arm64 stable, closing