diff --git a/knative-build/runtimes/javascript/utils/cleanjs.sh b/knative-build/runtimes/javascript/utils/cleanjs.sh
new file mode 100755
index 0000000..14335cc
--- /dev/null
+++ b/knative-build/runtimes/javascript/utils/cleanjs.sh
@@ -0,0 +1,44 @@
+#!/bin/bash
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+USAGE="cleanjs.sh <SOURCE_DIR>"
+
+if [ $1 ]
+then
+    : # $1 was given
+    SOURCE=$1
+
+    echo "SOURCE=[$SOURCE]"
+    TARGET=$SOURCE"/.cleanjs"
+    echo "TARGET=[$TARGET]"
+
+    # create target directory
+    mkdir -p $TARGET
+
+    # copy all javascript files while preserving the original path
+    find $SOURCE -name "*.js" | cpio -p -dumv $TARGET/
+
+    # remove the package itself
+    find $TARGET -type f -exec sed -i '' -e '\|utils/debug|d' '{}' \;
+
+    # remove all lines that dereference the package (i.e., named DEBUG by convention)
+    find $TARGET -type f -exec sed -i '' -e '/DEBUG/d' '{}' \;
+
+else
+    echo $USAGE
+    exit 1
+fi