Hello, we deprecated locationCopy and CopyPersistent from zope.locaton.pickling with the 3.5.3 release (which should have been a new major release, by the way). This introduced a new dependency on zope.deferredimport, but I just realized that according to the decisions taken by the streering group, the right way to deprecate code is to *not* use zope.deferredimport: http://docs.zope.org/zopetoolkit/steeringgroup/decisions.html I thus propose to stop using zope.deferredimport in core ZTK packages, as stated in the page I mentioned above, unless a new decision is made by who is in charge of making decisions. What about removing the use of zope.deferredimport from zope.location and make a new major release of zope.location? Thanks, Fabio