not only pykolab was missing. The order which package to compile, install and compile again is important but we will manage this.
Now I had to compile libkolab, kolab-utils and may be some more.
I have my DEB directory in the sources.list so I know which package is currently missing (aptitude says "unavailable"). So I change into that directory, running "apt-get build-dep packagename" and it should now install all missing packages. The new one are now in my DEB directory and a "apt-get update" will take the new ones into account.
Don't forget a
dpkg-scanpackages . | gzip -c9 > Packages.gz
before running apt-get update so the Packages.gz file is new and includes the newly created DEBs..
The story continues :-)