These are my notes for building on Ubuntu 9.10 (Debian Source Build Notes)

$ sudo apt-get install rsync python-dev build-essential make bzip2 sudo subversion sysv-rc-conf snmpd swig autoconf mysql-server-5.0 libmysqlclient15-dev libmysqlclient15off ttf-liberation ttf-linux-libertine unzip

sudo adduser zenoss
sudo mkdir /usr/local/zenoss
sudo chown zenoss /usr/local/zenoss
sudo su - zenoss

#add these to the .bashrc
export ZENHOME=/usr/local/zenoss
export PYTHONPATH=$ZENHOME/lib/python
export PATH=$ZENHOME/bin:$PATH

. ~/.bashrc

#2.5.X
zenoss# svn co http://dev.zenoss.org/svn/branches/zenoss-2.5.x/inst 2.5.x
zenoss# cd 2.5.x
zenoss# SVNTAG=branches/2.5.x ./install.sh

Changes for trunk

#trunk
svn co http://dev.zenoss.org/svn/trunk/inst zenossinst
cd zenossinst
./install.sh

This error means need the Sun JDK, but it's just a warning (and UI performance will be slow)
export JSBUILDER=/home/zenoss/zenossinst/build/JSBuilder2.jar && \
        DESTDIR= /home/zenoss/zenossinst/buildjs.sh
This script requires the Sun JDK 1.6 or greater.

This was found on the first pass on QA Test Day

http://dev.zenoss.org/trac/ticket/6395

The work-around appears to be

apt-get install install librrd4

I was building on an Amazon EC2 instance without access to port 8080, so I'll need to start another instance with that opened up to see if it actually comes up