DIST=unstable ARCH=amd64 git-pbuilder create --debootstrapopts --keyring=/usr/share/keyrings/devuan-archive-keyring.gpg
gbp buildpackage --git-dist=unstable --git-arch=amd64 --git-pbuilder --git-tag --git-retag --git-notify=off
sudo piuparts --distribution=unstable --arch=amd64 --existing-chroot=/var/cache/pbuilder/base-unstable-amd64.cow/ ../loopidity_0.14.005-1_amd64.deb

ERROR:root:Unknown set of defaults: devuan
ERROR:root:piuparts run ends.

package piuparts
  /usr/sbin/piuparts
    class DefaultsFactory
    class DevuanDefaults
      http://ftp.auto.mirror.devuan.org/merged
      /usr/share/keyrings/devuan-archive-keyring.gpg
      distro_info.DevuanDistroInfo().devel()

package python-distro-info
  /usr/lib/python2.7/dist-packages/distro_info.py
    class DistroInfo
    class DevuanDistroInfo
  /usr/share/distro-info/debian.csv