on the wiki is an explanation how to get the nightly build (See below);
If I use this I only get sources form a few weeks ago. Should I use another.
From the Wiki:
The Install dialog appears, then click on button Add ...
In the name field enter Scout Nightly, in the Location field enter http://download.eclipse.org/scout/nightly/update/, then click OK
Eclipse connects to the Scout nightly update site and offers the available components in the field below