diff -rupN a/engines/rhino/bin/narwhal-rhino b/engines/rhino/bin/narwhal-rhino
--- a/engines/rhino/bin/narwhal-rhino	2011-11-16 11:01:40.000000000 +0000
+++ b/engines/rhino/bin/narwhal-rhino	2012-04-23 18:35:45.000000000 +0100
@@ -22,7 +22,7 @@ fi
 CLASSPATH=$NARWHAL_ENGINE_HOME/jars/jna.jar
 BOOTCLASSPATH=$NARWHAL_ENGINE_HOME/jars/js.jar

-JAVA_OPTS="-Dnarwhal.http_proxy=$http_proxy"
+JAVA_OPTS="-Dnarwhal.http_proxy=$http_proxy $JAVA_OPTS"

 if [ -n "$NARWHAL_CLASSPATH" ]; then
     CLASSPATH=$NARWHAL_CLASSPATH:$CLASSPATH