$ sudo apt-get update
$ sudo apt-get install dovecot-lucene 

dovecot-lucene is installed in your system.

Make ensure the dovecot-lucene package were installed using the commands given below,

$ sudo dpkg-query -l | grep dovecot-lucene *

You will get with dovecot-lucene package name, version, architecture and description in a table

dovecot-lucene package basic information: