diff --git a/CMakeLists.txt b/CMakeLists.txt
index 03e1cc7..edbd05f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -256,11 +256,11 @@ ENDIF()
 
 ADD_SUBDIRECTORY(lemon)
 IF(${CMAKE_SOURCE_DIR} STREQUAL ${PROJECT_SOURCE_DIR})
-  ADD_SUBDIRECTORY(contrib)
-  ADD_SUBDIRECTORY(demo)
-  ADD_SUBDIRECTORY(tools)
-  ADD_SUBDIRECTORY(doc)
-  ADD_SUBDIRECTORY(test)
+  # ADD_SUBDIRECTORY(contrib)
+  # ADD_SUBDIRECTORY(demo)
+  # ADD_SUBDIRECTORY(tools)
+  # ADD_SUBDIRECTORY(doc)
+  # ADD_SUBDIRECTORY(test)
 ENDIF()
 
 CONFIGURE_FILE(
