[Zope] ZPatterns 0.3.0

Hi Guys, I was trying to setup ZPatterns 0.3.0 and I got up to making the extension DynPersistc. I had run "make -f Makefile.pre.in boot" and then I ran "make" but an error occured saying that ExtensionClass.h couldn't be found. If anyone knows what is wrong I would much appreciate it. The only other thing I can tell you (and I don't know if it means anything) is that it seemed to be looking for ExtensionClass in teh <Zopeinstall>/lib/Components dir and there is no Components dir there, perhaps I need to add something to my Zope install. Cheers, Pete