[Pkg-exim4-users] main option "exim_version" unknown

[Ron Varburg]

I am trying to customize exim_version in my config.
exim_version is mentioned at spec.txt.
I have tried to:
    # zcat /usr/share/doc/exim4/examples/example.conf.gz > /etc/exim4/exim.conf
    # sed -i '/primary_hostname =/i\exim_version =' /etc/exim4/exim.conf
    # exim -C /etc/exim4/exim.conf -bV
    Exim version 4.92 #5 built 13-May-2020 16:01:31
    Copyright (c) University of Cambridge, 1995 - 2018
    (c) The Exim Maintainers and contributors in ACKNOWLEDGMENTS file, 2007 - 2018
    Berkeley DB: Berkeley DB 5.3.28: (September  9, 2013)
    Support for: crypteq iconv() IPv6 GnuTLS move_frozen_messages DANE DKIM DNSSEC Event   OCSP PRDR SOCKS TCP_Fast_Open
    Lookups (built-in): lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmjz dbmnz dnsdb dsearch nis nis0 passwd
    Authenticators: cram_md5 plaintext
    Routers: accept dnslookup ipliteral manualroute queryprogram redirect
    Transports: appendfile/maildir/mailstore autoreply lmtp pipe smtp
    Fixed never_users: 0
    Configure owner: 0:0
    Size of off_t: 8
    2020-06-30 21:49:25 Exim configuration error in line 62 of /etc/exim4/exim.conf:
      main option "exim_version" unknown

Am I doing something wrong?