Future proof: both `nil` and `$nil` in package prologue.

src/Wrappers-JQuery.js

@@ -8,7 +8,8 @@ define(["amber/boot"
 //>>excludeEnd("imports");
 ){"use strict";
 if(!$boot.nilAsReceiver)$boot.nilAsReceiver=$boot.nil;
-var $core=$boot.api,nil=$boot.nilAsReceiver,$recv=$boot.asReceiver,$globals=$boot.globals;
+if(!("nilAsValue" in $boot))$boot.nilAsValue=$boot.nilAsReceiver;
+var $core=$boot.api,nil=$boot.nilAsValue,$nil=$boot.nilAsReceiver,$recv=$boot.asReceiver,$globals=$boot.globals;
 if(!$boot.nilAsClass)$boot.nilAsClass=$boot.dnu;
 $core.addPackage("Wrappers-JQuery");
 $core.packages["Wrappers-JQuery"].innerEval = function (expr) { return eval(expr); };