I Have a problem buil zabbix-server and net-snmp

[Эдуард Ахматгареев]

checking for mysql_config... /usr/local/bin/mysql_config
checking for main in -lmysqlclient ... yes
checking for function PQserverVersion()... no
checking for Zabbix server database selection... ok
checking for pkg-config... /usr/local/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for IKSEMEL... yes
checking for getaddrinfo... yes
checking for gawk... (cached) nawk
checking for curl-config... /usr/local/bin/curl-config
checking for the version of libcurl... 7.20.0
checking for libcurl >= version 7.13.1... yes
checking for main in -lcurl... yes
checking whether libcurl is usable... yes
checking for curl_free... yes
checking for net-snmp-config... /usr/local/bin/net-snmp-config
checking for main in -lnetsnmp ... no
configure: error: Not found NET-SNMP library
===>  Script "configure" failed unexpectedly.
Please report the problem to ports at christianserving.org [maintainer] and
attach the
"/usr/ports/usr/ports/net-mgmt/zabbix-server/work/zabbix-1.8.2/config.log"
including the output of the failure of your make command. Also, it might be
a good idea to provide an overview of all packages installed on your system
(e.g. an `ls /var/db/pkg`).
*** Error code 1

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

Stop in /usr/ports/net-mgmt/zabbix-server.
zabbix#


I Have a make install clean  zabbix-server in jail system.