The time on your machine is probably set wrong. The Makefile timestamp needs to be after the Makefile.PL timestamp. If your machine is living in the past (as it were) rewriting the Makefile will not fix this problem as it will still be timestamped in the past with regards to Makefile.PL. As an alternative to fixing your clock, you will probably find that simply touch(ing) all the files in the distro fixes the problem.