diff --git a/makeCGAL b/makeCGAL
index 4e58844..8203b8c 100755
--- a/makeCGAL
+++ b/makeCGAL
@@ -34,14 +34,13 @@
 #     simply specify a 'system' version. For example,
 #         makeCGAL boost-system gmp-system
 #
-#     Mixing system and ThirdParty for gmp/mpfr is not supported.
-#
 #------------------------------------------------------------------------------
 
 # Get CGAL, boost and gmp/mpfr versions
 . $WM_PROJECT_DIR/etc/config.sh/functions
-_foamEval SOURCE_CGAL_VERSIONS_ONLY=yes \
-          $($WM_PROJECT_DIR/bin/foamEtcFile config.sh/CGAL)
+unset _foamAddPath _foamAddLib _foamAddMan # get settings only
+
+_foamSource $($WM_PROJECT_DIR/bin/foamEtcFile config.sh/CGAL)
 _foamSource $($WM_PROJECT_DIR/bin/foamEtcFile config.sh/compiler)
 
 boostPACKAGE=${boost_version:-boost-system}
@@ -83,8 +82,6 @@ To override this behaviour (and use the system boost and/or gmp/mpfr),
 simply specify a 'system' version. For example,
     $Script boost-system gmp-system
 
-Note: mixing system and ThirdParty for gmp/mpfr is not supported.
-
 USAGE
     exit 1
 }