diff --git a/cpp/cmake_modules/DefineOptions.cmake b/cpp/cmake_modules/DefineOptions.cmake
index 0a43ec1..c468d48 100644
--- a/cpp/cmake_modules/DefineOptions.cmake
+++ b/cpp/cmake_modules/DefineOptions.cmake
@@ -82,7 +82,7 @@ macro(define_option_string name description default)
 endmacro()

 # Top level cmake dir
-if("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
+if(1)
   #----------------------------------------------------------------------
   set_option_category("Compile and link")