--- ng/CMakeLists.txt
+++ ng/CMakeLists.txt
@@ -70,6 +70,6 @@ if(USE_GUI)
         DESTINATION ${NG_INSTALL_DIR_BIN} COMPONENT netgen)
   endif()
 
-  add_subdirectory(Togl2.1)
+  # add_subdirectory(Togl2.1)
 endif(USE_GUI)