problem updating mozilla

[Filippo Moretti]

When attempting to update mozilla I get the following error

nd
===>   mozilla-1.7.12_3,2 depends on executable: pkg-config - found
===>   mozilla-1.7.12_3,2 depends on shared library: jpeg.9 - found
===>   mozilla-1.7.12_3,2 depends on shared library: png.5 - found
===>   mozilla-1.7.12_3,2 depends on shared library: nspr4 - found
===>   mozilla-1.7.12_3,2 depends on shared library: nss3 - not found
===>    Verifying install for nss3 in /usr/ports/security/nss
===>  Patching for nss-3.10
===>   nss-3.10 depends on file: /usr/local/bin/perl5.8.7 - found
===>  Applying FreeBSD patches for nss-3.10
patch: **** can't cd to 
/usr/ports/security/nss/work/nss-3.10/mozilla/security/nss: No such file 
or directory
=> Patch patch-..::coreconf::FreeBSD.mk failed to apply cleanly.
*** Error code 1

Stop in /usr/ports/security/nss.
*** Error code 1

Stop in /usr/ports/www/mozilla
any help appreciated
sincerely
Filippo