kai@kai-Lenovo-XiaoXin-Air-13IWL:~/geant4-build$ cmake -DCMAKE_INSTALL_PREFIX=$HOME/geant4-install
CMake Warning:
No source or binary directory provided. Both will be assumed to be the
same as the current working directory, but note that this warning will
become a fatal error in future CMake releases.
CMake Error: The source directory "/home/kai/geant4-build" does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.