Add the Raspian Package Repo to the sources:
deb http://packages.icinga.org/raspbian icinga-wheezy main
deb-src http://packages.icinga.org/raspbian icinga-wheezy main
Install the Sources from the official Icinga Repo
$ sudo apt-get update
$ apt-get source icinga2-common
$ cd icinga2-2.3.4~wheezy/
$ dpkg-buildpackage
$ sudo dpkg -i icinga2_2.3.4~wheezy_armhf.deb icinga2-bin_2.3.4~wheezy_armhf.deb icinga2-common_2.3.4~wheezy_all.deb icinga2-doc_2.3.4~wheezy_all.deb icinga2-ido-pgsql_2.3.4~wheezy_armhf.deb