diff --git a/CMakeLists.txt b/CMakeLists.txt
index dfea5548b..f9228e5fd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -82,6 +82,7 @@ SUBDIRS(Source Modules Templates Utilities)
 ENABLE_TESTING()
 
 # Include the standard Dart testing module
+SET(DART_ROOT "" CACHE INTERNAL "" FORCE)
 INCLUDE (${CMAKE_ROOT}/Modules/Dart.cmake)
 
 # use the ansi CXX compile flag for building cmake