I have set up postfix and am now attempting to set up dovecot. I did apt-get install dovecot-common
I have changed dovcot.conf to include the following

protocols = imap imaps

And I now get this error when restarting dovcot

Error: mail_executable: Can't use /usr/lib/dovecot/imap: No such file
or directory Fatal: Invalid configuration in /etc/dovecot/dovecot.conf

Did I install the wrong package, is there another package I need, or am I missing something else ?

Thanks.