problems with lang/php5-extensions

[Jonathan Horne]

never had this issue until today.  i have box (same config or build
process as all my others) that already has net-snmp built from port. 
today, went to install php5 and php5-extensions.  php5 had no issues, but
php5-extensions is trying to build ucd-snmp, and then errors out that its
incompatible with net-snmp.  the 'make config' only has options for
snmp-yes or snmp-no... not which snmp port i prefer.

===>  Installing for ucd-snmp-4.2.6_4

===>  ucd-snmp-4.2.6_4 conflicts with installed package(s):
      net-snmp-5.2.2_2

      They install files into the same place.
      Please remove them first with pkg_delete(1).
*** Error code 1

Stop in /usr/ports/net-mgmt/net-snmp4.
*** Error code 1

Stop in /usr/ports/net-mgmt/php5-snmp.
*** Error code 1

Stop in /usr/ports/lang/php5-extensions.



FreeBSD fbsd60-2.dev.dfwlp.com 6.1-RELEASE-p2 FreeBSD 6.1-RELEASE-p2 #0:
Tue Jun 27 12:02:14 CDT 2006    
root at fbsd60-2.dev.dfwlp.com:/usr/obj/usr/src/sys/FBSD60-2  i386

how can i prevent php5-extensions from choose ucd-snmp?

thanks,
jonathan