Unfortunately, I've never used Set::Array myself .. I just thought it looked effective for the OP's problem.
You might want to start a new SoPW topic with this problem installing Want (and Set::Array?). I do notice that Set::Array does not show up on the "Module List" page of CPAN anymore, so maybe it's been abandoned. (I admit I don't know a whole lot of how CPAN is administered).
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