--- a/src/wscript	Mon Dec 29 14:19:25 2008 +0000
+++ b/src/wscript	Mon Dec 29 15:48:34 2008 +0000
@@ -125,7 +125,7 @@
             task.set_outputs([dst_node])
 
 class ns3header_task(Task.Task):
-    before = 'cc cxx'
+    before = 'cc cxx gen_ns3_module_header_task'
     color = 'BLUE'
     def run(self):
         assert len(self.inputs) == len(self.outputs)
@@ -146,6 +146,7 @@
 
 class gen_ns3_module_header_task(Task.Task):
     before = 'cc cxx'
+    after = 'ns3header_task'
     color = 'BLUE'
     def run(self):
         assert len(self.outputs) == 1