--- cmake/Modules/Geant4BuildProjectConfig.cmake.orig
+++ cmake/Modules/Geant4BuildProjectConfig.cmake
@@ -165,7 +165,7 @@ configure_file(${PROJECT_SOURCE_DIR}/cmake/Templates/UseGeant4_internal.cmake
 # - Generate Install Tree Configuration Files
 #-----------------------------------------------------------------------
 # Set needed variables for the install tree
-set(GEANT4_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/${PROJECT_NAME}-${${PROJECT_NAME}_VERSION})
+set(GEANT4_CMAKE_DIR lib/${PROJECT_NAME}-${${PROJECT_NAME}_VERSION})
 
 # Header path for install tree is dependent on whether we have a relocatable
 # install.