diff --git a/src/osgEarthDrivers/CMakeLists.txt b/src/osgEarthDrivers/CMakeLists.txt
index dd54d0ae8..37b2fbd83 100644
--- a/src/osgEarthDrivers/CMakeLists.txt
+++ b/src/osgEarthDrivers/CMakeLists.txt
@@ -19,7 +19,6 @@ add_subdirectory(earth)
 add_subdirectory(engine_rex)
 add_subdirectory(featurefilter_intersect)
 add_subdirectory(featurefilter_join)
-add_subdirectory(gltf)
 add_subdirectory(kml)
 add_subdirectory(script_engine_duktape)
 add_subdirectory(sky_gl)
@@ -45,5 +44,4 @@ add_subdirectory(cache_rocksdb)
 
 IF(NOT APPLE AND NOT ANDROID)
     add_subdirectory(fastdxt)
-    add_subdirectory(lerc)
 ENDIF()