Since approximately Nov, 2017 I get: “unresolvable Arch_Extra nothing provides libidn2”
Link is: https://build.opensuse.org/package/show/home:rickrich:gnome-manual-duplex/gnome-manual-duplex#
It used to work for all three repositories Debian, Redhat, and Arch.
I added Architecture: x86_64.
Now the “nothing provides libidn2” is replaced by “nothing provides transfig”.
“transfig” is part of https://en.wikipedia.org/wiki/Xfig.
Under Arch, “fig2dev” also provides “transfig”:
https://www.archlinux.org/packages/?sort=&q=fig2dev&maintainer=&flagged=
but it is in “Arch Community”, not “Arch Extra” since Nov. 11, 2017.
Unfortunately, Arch Community is NOT selectable do to a BUG in OBS!