expansion error : nothing provides libwxgtk2.8-dev

Hi all, I try to build a package with OBS build service ; no problems to create RPMs so far (OpenSUSE/Fedora/Mandriva) ; but I face a problem with xUbuntu 8.10, after providing the debian files, the build fails with :

expansion error  	 nothing provides libwxgtk2.8-dev, nothing provides wx2.8-headers 

I’m afraid that libwxgtk isn’t included in the default Ubuntu repository, it seems to be in the ‘universe’ one. Is there a away to use libwxgtk in the OpenSUSE build service ?

You can steal this package from Ubuntu repository to your OBS project. Just download .dsc, .diff.gz and .orig.tar.gz from Ubuntu – Details of source package wxwidgets2.8 in intrepid and add them to a package.
You can disable publishing for this package so that it wouldn’t duplicate package from “Universe”.

Is there no way I can tell OBS to use the universe repository of ubuntu? In debian it works without adding seperate packages and I would prefere that the debian packages are linked against their own, and ubuntu against their own too.