Recompile with $pkg.

src/Silk.js

@@ -1,9 +1,9 @@
 define(["amber/boot", "amber_core/Kernel-Collections", "amber_core/Kernel-Infrastructure", "amber_core/Kernel-Methods", "amber_core/Kernel-Objects", "domite/DOMite"], function($boot){"use strict";
 if(!("nilAsValue" in $boot))$boot.nilAsValue=$boot.nilAsReceiver;
 var $core=$boot.api,nil=$boot.nilAsValue,$nil=$boot.nilAsReceiver,$recv=$boot.asReceiver,$globals=$boot.globals;
-$core.addPackage("Silk");
-($core.packageDescriptors||$core.packages)["Silk"].innerEval = function (expr) { return eval(expr); };
-($core.packageDescriptors||$core.packages)["Silk"].transport = {"type":"amd","amdNamespace":"silk"};
+var $pkg = $core.addPackage("Silk");
+$pkg.innerEval = function (expr) { return eval(expr); };
+$pkg.transport = {"type":"amd","amdNamespace":"silk"};
 
 $core.addClass("Silk", $globals.Domite, [], "Silk");
 //>>excludeStart("ide", pragmas.excludeIdeData);