I have been working on packaging software into RPMs for my company. These RPMs create directories in %post into which dependent RPMs install components. If I yum remove the main package it will be erased first by yum prior to erasing the dependent packages. When the uninstall scripts for the dependent packages run, they may fail due to files and directories being missing that they expect from the main package leaving things in an inconsistent state. Is this a bug or known behavior we need to account for in some way?