Debian 9 stretch

list Trever Noggle
Thu, 27 Sep 2018 17:08:19 -0600
Message-Id: <000801d456b6$fbddf110$f399d330$@tandj.org>

Trying to install Xymon on Debian 9 and it is failing do to missing package
librrd2-dev.  This package is not available in the apt repository.  The
instructions that are available talk about installing on Debian 6 Squeeze.
Are there update instructions anywhere?