N1QL JS UDF:Execute of Prepared statement with Using clause does not work

function doDelivery(w_id)

{             var query= EXECUTE p1 using [$w_id];      }

PREPARE p1 from select wid from default where wid=$1;

create index ix1 on default(wid)

cbq> execute function doDelivery(1);

{

    "errors": [

{             "code": 10109,             "msg": "Error executing function doDel2 (delivery:doDel2): Evaluator error Exceptions from JS code : run doDel2 failed:\nException: Error: Execution parameter error: USING clause does not evaluate to static values\nLocation }