diff --git a/src/osgEarthDrivers/CMakeLists.txt b/src/osgEarthDrivers/CMakeLists.txt
index 79acbe9c4..89e28b141 100644
--- a/src/osgEarthDrivers/CMakeLists.txt
+++ b/src/osgEarthDrivers/CMakeLists.txt
@@ -31,7 +31,6 @@ add_subdirectory(earth)
 add_subdirectory(engine_rex)
 add_subdirectory(featurefilter_intersect)
 add_subdirectory(featurefilter_join)
-add_subdirectory(gltf)
 add_subdirectory(kml)
 add_subdirectory(mapinspector)
 add_subdirectory(monitor)
@@ -61,5 +60,4 @@ endif()
 
 IF(NOT APPLE AND NOT ANDROID)
     add_subdirectory(fastdxt)
-    add_subdirectory(lerc)
 ENDIF()