Hi! The just uploaded dpkg, got support for sqv, which is now installed by default on minimal chroots due to apt pulling it in on some architectures (instead of gpgv). But this support relies on new interfaces added in sqv 1.3.0.
On hurd-* and x32 ports, sqv looks outdated, which means it is present but not new enough to be usable by dpkg, which makes it fail its test suite (which will try to test it opportunistically). To fix dpkg FTBFS, either a newer sqv needs to be built on those ports, or maybe easier removed from now and then dpkg given back. (apt might also need to be given back to pick up gpgv instead of sqv, but have not checked, and maybe apt just works out of the box.) Thanks, Guillem