I have trouble registering utilities which depend on the presence of other utilities; eg. I have a package A where I want to register utility B which depends on registration of utility C. I tried to register B by putting registration in the __init__.py of A, which fails because at import time C is not yet registered. Registration by subscribing to the utility registration event handler for C also failed, because by the time the handler gets called, the utility C is not yet installed. My current workaround involves registration upon the IDatabaseOpen event, which is doubly ugly because Zope 2.10 doesnt send that event out of the box -- I send it in a monkey-patched Zope2.App.startup module. What is the canonical way to do this? Thanks, peter.