diff -ur _orig\command\build_ext.py .\command\build_ext.py
--- _orig\command\build_ext.py	Sat Apr 04 16:39:20 2009
+++ .\command\build_ext.py	Sat May 09 14:44:14 2009
@@ -457,8 +457,10 @@
         outputs = []
         for ext in self.extensions:
             fullname = self.get_ext_fullname(ext.name)
-            outputs.append(os.path.join(self.build_lib,
-                                        self.get_ext_filename(fullname)))
+            ext_filename=getattr(ext,'ext_filename',
+                                 os.path.join(self.build_lib,
+                                              self.get_ext_filename(fullname)))
+            outputs.append(ext_filename)
         return outputs
 
     # get_outputs ()
@@ -495,6 +497,7 @@
         else:
             ext_filename = os.path.join(self.build_lib,
                                         self.get_ext_filename(fullname))
+        ext.ext_filename=ext_filename
         depends = sources + ext.depends
         if not (self.force or newer_group(depends, ext_filename, 'newer')):
             log.debug("skipping '%s' extension (up-to-date)", ext.name)