For whatever reason, the tarball for 2.9.0 dropped "-final" from its name.

The makefile has to know the actual name.

inst/WinBuilders/mk/zope.mk

@@ -3,7 +3,7 @@ ZOPE_REQUIRED_FILES=tmp/$(ZOPEDIRNAME).tgz
 REQUIRED_FILES=$(PYTHON_REQUIRED_FILES)\
                $(ZOPE_REQUIRED_FILES)
 
-ZOPEVERSION=2.9.0-final
+ZOPEVERSION=2.9.0
 ZOPEDIRNAME=Zope-$(ZOPEVERSION)
 
 MAKEZOPE="$(MAKEFILEDIR)/bin/makezope.bat" "$(WIN_BUILD_DIR)"