Although that package was for sid, it seems to have been published last November. Since then, the KDE libraries have transitioned to newer versions(
kdelibs4c2a is the latest version in sid)
As archtoad6 suggested, your best option (unless you can find a recent sid package) is to build the program from source; that should be able to build with the current libraries (though you might need to install the -dev versions of debian packages--such as kdelibs4-dev)