Description of problem: When the owfs-fs package is updated, changes made to /usr/lib/systemd/system/owfs.service are lost. This is because the config files are not appropriately declared in the spec file. Expected results: Modified config files are preserved as per normal RPM behaviour. Additional info: Suggest to add following line, or similar, to %files section of spec file: %config /usr/lib/systemd/system/owfs.service
Files in /usr are not config files, and they are supposed to be overwritten on upgrade. If you need to modify unit file, copy it to /etc/systemd/system or use snippets mechanism.