diff --git a/CMakeModules/FindSimGear.cmake b/CMakeModules/FindSimGear.cmake
index cd966f0d..5489b32d 100644
--- a/CMakeModules/FindSimGear.cmake
+++ b/CMakeModules/FindSimGear.cmake
@@ -115,17 +115,12 @@ if(${SIMGEAR_LIBRARIES} STREQUAL "SIMGEAR_LIBRARIES-NOTFOUND")
   # linked in, and hence ability to link when using a traditional
   # linker such as GNU ld on Linux
     set(comps
-        tsync
-        environment
         nasal
         bucket
-        bvh
-        util 
         route
         timing
         io
         serial
-        sound
         structure
         props
         xml