Good afternoon

I want to install Necessitas (
http://sourceforge.net/p/necessitas/home/necessitas/) In Pardus, but the installer says i need to install the openJDK6-jdk package, so i installed sun-jdk from pisi. This didn't solve my problem so i downloaded the source package of OpenJDK 6. When i tried to build i got the following error.
tris@pardus2011 openjdk-6-src-b24-14_nov_2011 $ make all
which: no ant in (/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/opt/bin:/opt/sun-jre/bin)
jdk/make/common/shared/Defs-utils.gmk:79: *** "\"ant\" not found; please set ANT_HOME or put \"ant\" on your PATH". Gestopt.
So i guess, as i read in the README file:
I have to install JDK 6 on my system. But i don't want to mess up my current build of java in Pardus.
What would you guys suggest i do?

Thanks in advance
Tristan