Hi, The package dtc uses debhelper with a compat level of 5 or 6, which is no longer supported [1]. Please bump the debhelper compat at your earliest convenience * Compat 13 is recommended (supported in stable-backports) * Compat 7 is the bare minimum Thanks, Andreas [1] https://lists.debian.org/debian-devel/2020/07/msg00065.html