Got an error trying to build KDE from source...
Building kwindowsystem (build system KDE) from frameworks (7/105) Cloning kwindowsystem Source update complete for kwindowsystem: 110 files affected. Preparing build system for kwindowsystem. Running cmake... Unable to configure kwindowsystem with CMake! Unable to configure kwindowsystem with KDE
Went into the build directory and ran make to see what failed, noticed XCB ICCCM headers was missing.