diff --git a/hudson_build_release.sh b/hudson_build_release.sh
index 0be787c..76c75bd 100755
--- a/hudson_build_release.sh
+++ b/hudson_build_release.sh
@@ -13,6 +13,7 @@ mkdir -p sgBuild
 mkdir -p fgBuild
 mkdir -p output
 rm -rf output/*
+rm -rf $WORKSPACE/dist/include/simgear $WORKSPACE/dist/libSim* $WORKSPACE/dist/libsg*.a
 
 #####################################################################################
 echo "Starting on SimGear"