[root@host] /usr/ports/net-mgmt/zabbix-agent/> make
===>  zabbix-agent-1.8.13,2 has known vulnerabilities:
Downloading fresh database.
auditfile.tbz                                           79 kB  732 kBps
unknown option '-sha256'
options are
-c              to output the digest with separating colons
-d              to output debug info
-hex            output as hex dump
-binary         output in binary form
-sign   file    sign digest using private key in file
-verify file    verify a signature using public key in file
-prverify file  verify a signature using private key in file
-keyform arg    key file format (PEM or ENGINE)
-signature file signature to verify
-binary         output in binary form
-engine e       use engine e, possibly a hardware device.
-md5 to use the md5 message digest algorithm (default)
-md4 to use the md4 message digest algorithm
-md2 to use the md2 message digest algorithm
-sha1 to use the sha1 message digest algorithm
-sha to use the sha message digest algorithm
-mdc2 to use the mdc2 message digest algorithm
-ripemd160 to use the ripemd160 message digest algorithm
portaudit: Database contains invalid signature.
Old database restored.
portaudit: Download failed.
=> Please update your ports tree and try again.
*** Error code 1

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