diff --git a/Installation/lib/cmake/CGAL/CGALConfig.cmake b/Installation/lib/cmake/CGAL/CGALConfig.cmake
index 486f1ff6746..ad0de1806ca 100644
--- a/Installation/lib/cmake/CGAL/CGALConfig.cmake
+++ b/Installation/lib/cmake/CGAL/CGALConfig.cmake
@@ -26,7 +26,11 @@ endfunction()
 
 cgal_detect_branch_build(BRANCH_BUILD)
 if(BRANCH_BUILD)
-  set(CGAL_ROOT ${CGAL_CONFIG_DIR}/../../../..)
+  set(CGAL_ROOT ${CGAL_CONFIG_DIR})
+  get_filename_component(CGAL_ROOT "${CGAL_ROOT}" DIRECTORY)
+  get_filename_component(CGAL_ROOT "${CGAL_ROOT}" DIRECTORY)
+  get_filename_component(CGAL_ROOT "${CGAL_ROOT}" DIRECTORY)
+  get_filename_component(CGAL_ROOT "${CGAL_ROOT}" DIRECTORY)
   set(CGAL_INSTALLATION_PACKAGE_DIR ${CGAL_ROOT}/Installation)
   set(CGAL_GRAPHICSVIEW_PACKAGE_DIR ${CGAL_ROOT}/GraphicsView)
   set(CGAL_MODULES_DIR ${CGAL_ROOT}/Installation/cmake/modules)
@@ -43,7 +47,10 @@ if(BRANCH_BUILD)
     endif()
   endforeach()
 else()
-  set(CGAL_ROOT ${CGAL_CONFIG_DIR}/../../..)
+  set(CGAL_ROOT ${CGAL_CONFIG_DIR})
+  get_filename_component(CGAL_ROOT "${CGAL_ROOT}" DIRECTORY)
+  get_filename_component(CGAL_ROOT "${CGAL_ROOT}" DIRECTORY)
+  get_filename_component(CGAL_ROOT "${CGAL_ROOT}" DIRECTORY)
 
   # not BRANCH_BUILD: it can be an installed CGAL, or the tarball layout
   if(EXISTS ${CGAL_CONFIG_DIR}/CGAL_add_test.cmake)