Hello I've installed Kubuntu CI in a VM, and my computer compiled "plasma-workspace" and its dependencies all night long using kdesrc-build.

How do I have to set kdedir in the kdesrc-build tool, if I want it to overwrite the existing KDE?

I currently set it to /usr. The timestamp of "/usr/bin/klipper" for example, is up-to-date, so compilation an installation of all of plasma-workspace's dependencies
and plasma-workspace itself seem to work.