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The obvious issue is that we can't change the semantics for
packages already out there.  Existing package maintainers
will not want this change made for them automatically, and
it is not clear that this is the desirable default behaviour
anyway.  Therefore, this isn't going to be considered a 'bug'.

I think what you are asking for is a new feature - a way to
give distutils the behaviour you desire, but leaving the
default semantics alone.  I suggest you close this bug as
"wont fix", and add a new feature request.  After that, try
and get some support for your idea from someone willing or
able to submit a patch.