diff -r ba912ef24b27 -r 7665471a56c1 rt/vm/src/main/java/org/apidesign/vm4brwsr/Main.java
--- a/rt/vm/src/main/java/org/apidesign/vm4brwsr/Main.java	Wed Apr 30 15:04:10 2014 +0200
+++ b/rt/vm/src/main/java/org/apidesign/vm4brwsr/Main.java	Tue May 27 12:25:41 2014 +0200
@@ -105,11 +105,16 @@
         }
         
         try (Writer w = new BufferedWriter(new FileWriter(gt))) {
-            Bck2Brwsr.newCompiler().library(createExtension).
+            Bck2Brwsr c = Bck2Brwsr.newCompiler().
                 obfuscation(obfLevel).
                 addRootClasses(classes.toArray()).
-                resources(new LdrRsrcs(Main.class.getClassLoader(), true)).
-                generate(w);
+                resources(new LdrRsrcs(Main.class.getClassLoader(), true));
+            
+            if (createExtension) {
+                c = c.library();
+            }
+            
+            c.generate(w);
         }
     }