[Zope] Zope2.7 on Debian install problem

Having a problem with upgrading Zope2.7 on Debian - when I run apt-get I keep getting Setting up zope2.7 (2.7.2-0-4) ... Traceback (most recent call last): File "/usr/lib/zope2.7/debian/fhs.py", line 31, in ? os.symlink(J((shared , a) ),J((debian , libd , a) )) OSError: [Errno 17] File exists dpkg: error processing zope2.7 (--configure): subprocess post-installation script returned error exit status 1 Errors were encountered while processing: zope2.7 E: Sub-process /usr/bin/dpkg returned an error code (1) Any suggestions? Is there a more specific place for asking zope/debian specific questions? Cheers David