Tim, Serghei,
I tried to build knetworkmanager9 and it looks like the CMakeLists.txt still points to the knetworkmanager-0.8 directory which isn't found in the 9 source. The error was:
CMake Error at CMakeLists.txt:66 (add_subdirectory): add_subdirectory given source "knetworkmanager-0.8" which is not an existing directory.