[Zope] ZPatterns make problem part2

I installed the dev version of python which solved my first problem but when I do a make I get this zope@phonix:/usr/local/dc/zope/lib/python/Products/ZPatterns$ make gcc -fPIC -I../../ZODB -I../../../Components/ExtensionClass -g -O2 -I/usr/include/python1.5 -I/usr/include/python1.5 -DHAVE_CONFIG_H -c ./DynPersist.c In file included from ./DynPersist.c:1: ../../ZODB/cPersistence.h:89: ExtensionClass.h: No such file or directory make: *** [DynPersist.o] Error 1 Am I missing something? / the point!? reading http://www.digicool.com/releases/ExtensionClass/ it says that ExtensionClass is part of Zope and I cant find any mention of this on zope.org Thanks Owen