[Dovecot] Sieve Plugin Help

[Asai]

When I run # dovecot --build-options

I get:
Build options: ioloop=epoll notify=inotify ipv6 openssl
Mail storages: cydir dbox maildir mbox raw shared
SQL driver plugins: mysql postgresql sqlite
Passdb: checkpassword ldap pam passwd passwd-file shadow sql
Userdb: nss ldap(plugin) passwd passwd-file prefetch sql static

I don't see anything here mentioning Sieve.  Does this mean that Sieve 
is not enabled in this build?

-- 
--asai