> However I've a question regarding pkgsrc. There are several own-backed pkgsrc > packages (build is performed always on the backup machine, and pkgin is used > to update the online server) installed.
What do you mean by own-backed? Using builtin libraries? When you upgrade, the old library versions stay around, so old packages continue to work -- with the exception of things depending on osabi, which might break. To be in a supported configuration, it would make sense to rebuild all packages in the right order. For instance, do pkg_admin set rebuild=YES \* pkg_rolling-replace -v on the backup, then copy over the resulting binary packages and install them on the other machine. Or change the pkgin repository to 8.0_2019Q1 and do a "pkgin full-upgrade". -- Benny