Installing Mod Security 2 on Ubuntu 8.04 server

I wanted to install Mod Security 2 on my Ubuntu Jeos 8.04 server, but there isn't a package anymore.
Some googling later I came across this article: How to install Mod Security 2.
I didn't modify the Makefile; just run

./configure

in the apache2 directory and it works.
If this is the first thing you compile on Ubuntu server you also have to install the build tools with the following command:

sudo apt-get install build-essential