--- bundle.lisp	2013-03-18 09:33:56.000000000 -0400
+++ bundle-patched.lisp	2013-03-20 20:30:58.000000000 -0400
@@ -414,7 +414,7 @@
           (error "prologue-code and epilogue-code are not supported on ~A"
                  (implementation-type)))
         (with-staging-pathname (output-file)
-          (combine-fasls fasl-files output-file)))))
+          (combine-fasls (remove-if-not #'probe-file fasl-files) output-file)))))
 
   (defmethod input-files ((o load-op) (s precompiled-system))
     (declare (ignorable o))