Sorry to jump on this thread late. And I'm sure we're all glad, SS, that you decided to try packaging out. It's both easy and ain't easy, ain't it?
In regards to your PM query, I hope my reply works out.
Now, just a couple of suggestions. Install ccache. It will speed up your succeeding rebuilds. Another thing try and keep your build environment as "clean" as possible. This means try and remove any dependencies and development libs that were installed for the previous build.
And also remember when packaging Qt and KDE, when cmake is required and well, the dependency was not indicated on the spec and cmake is nowhere to be found, you can find it on kdelibs-devel.
Go for it, SS. We're rooting for you!