diff --git a/Extras/CMakeLists.txt b/Extras/CMakeLists.txt
index fc0d22604..58a161a45 100644
--- a/Extras/CMakeLists.txt
+++ b/Extras/CMakeLists.txt
@@ -1,5 +1,36 @@
-SUBDIRS( InverseDynamics BulletRoboticsGUI BulletRobotics obj2sdf Serialize ConvexDecomposition HACD GIMPACTUtils )
+OPTION(BUILD_INVERSE_DYNAMIC_EXTRA "Build InverseDynamic extra module, only applied when BUILD_EXTRAS is ON" ON)
+OPTION(BUILD_BULLET_ROBOTICS_GUI_EXTRA "Build BulletRoboticsGUI extra module, only applied when BUILD_EXTRAS is ON" ON)
+OPTION(BUILD_BULLET_ROBOTICS_EXTRA "Build BulletRobotics extra module, only applied when BUILD_EXTRAS is ON" ON)
+OPTION(BUILD_OBJ2SDF_EXTRA "Build obj2sdf extra module, only applied when BUILD_EXTRAS is ON" ON)
+OPTION(BUILD_SERIALIZE_EXTRA "Build Serialize extra module, only applied when BUILD_EXTRAS is ON" ON)
+OPTION(BUILD_CONVEX_DECOMPOSITION_EXTRA "Build ConvexDecomposition extra module, only applied when BUILD_EXTRAS is ON" ON)
+OPTION(BUILD_HACD_EXTRA "Build HACD extra module, only applied when BUILD_EXTRAS is ON" ON)
+OPTION(BUILD_GIMPACTUTILS_EXTRA "Build GIMPACTUtils extra module, only applied when BUILD_EXTRAS is ON" ON)
 
+IF(BUILD_INVERSE_DYNAMIC_EXTRA)
+  SUBDIRS( InverseDynamics )
+ENDIF()
+IF(BUILD_BULLET_ROBOTICS_GUI_EXTRA)
+  SUBDIRS( BulletRoboticsGUI )
+ENDIF()
+IF(BUILD_BULLET_ROBOTICS_EXTRA)
+  SUBDIRS( BulletRobotics )
+ENDIF()
+IF(BUILD_OBJ2SDF_EXTRA)
+  SUBDIRS( obj2sdf )
+ENDIF()
+IF(BUILD_SERIALIZE_EXTRA)
+  SUBDIRS( Serialize )
+ENDIF()
+IF(BUILD_CONVEX_DECOMPOSITION_EXTRA)
+  SUBDIRS( ConvexDecomposition )
+ENDIF()
+IF(BUILD_HACD_EXTRA)
+  SUBDIRS( HACD )
+ENDIF()
+IF(BUILD_GIMPACTUTILS_EXTRA)
+  SUBDIRS( GIMPACTUtils )
+ENDIF()
 
 
 #Maya Dynamica plugin is moved to http://dynamica.googlecode.com