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But both '/etc/os-release' and '/usr/lib/os-release' are owned by 'base-files'... An upgrade of 'base-files' would be replacing (silently, since is not marked as a configuration file) '/usr/lib/os-release' with the version of the upstream 'base-files' package and possibly breaking any tools in the system relying on certain values in that file. Is there a reason that I'm missing for doing so instead of the Debian-way (file diversion with dpkg-divert)? Or any hack that I've overseen that avoids the mentioned breakage? Hasta la vista,   Silvano [1] https://github.com/ilbers/isar/blob/a0d6de4ac7dfb926b38cfcd44f2bc8852f2e43e3/meta/classes/image-postproc-extension.bbclass#L20