diff --git a/pkgs/development/compilers/j2sdk/builder.sh b/pkgs/development/compilers/j2sdk/builder.sh
index b01efbe881e3..ae3ae055b839 100755
--- a/pkgs/development/compilers/j2sdk/builder.sh
+++ b/pkgs/development/compilers/j2sdk/builder.sh
@@ -19,3 +19,11 @@ yes yes | ./$src || exit 1
 
 mkdir $out || exit 1
 mv $dirname/* $out/ || exit 1
+
+# remove crap in the root directory
+for file in $out/*
+do
+  if test -f $file ; then
+    rm $file
+  fi
+done