The build failure quoted above is not reproducible with the current state of sid, I think. However, it is still not possible to build swarmkit for a different reason: an indirect dependency on golang-github-juju-ansiterm. See #886613 and the "Dependency installability problem for swarmkit" on arm64 and other architectures: https://buildd.debian.org/status/package.php?p=swarmkit&suite=sid
