Vaadin 7 compilation problem

I’m trying to compile the vaadin 7 from source on ubuntu 12.04. I got the gwt from the svn repository, that I can build successfully.
The Vaadin source I cloned from the vaadin git repo (http://dev.vaadin.com/git/vaadin.git) and I run the compillation with this:

#:/home/matyig/devel/vaadin$ ant -Dgwt.lib.dir=/home/matyig/devel/gwt/build/lib/

BUILD FAILED
/home/matyig/devel/vaadin/build.xml:13: The following error occurred while executing this line:
/home/matyig/devel/vaadin/shared/build.xml:19: The following error occurred while executing this line:
/home/matyig/devel/vaadin/common.xml:169: /home/matyig/devel/vaadin/build/gwt/gwt-user.jar does not exist.

Any ideas to fix it?