Looking at the Makefile.PL file for one of my own CPAN modules, I believe the lines should be as follows: 
EXE_FILES => [ 'GribView.pl' ],
DIR       => [ 'Grib' ],

[download]
Is it possible for you to locally hack the Makefile.PL file so that you can proceed?

If that works, you could submit a patch on the PDL::IO::Grib site: Report a bug

Update: Someone already reported this issue 6 years ago (without a patch) -- when I checked a few minutes ago, I could not even access the RT site.

This module has no passing tests on any platforms, according to the CPAN Testers. One of the test failure reports shows your message. The last update to this module was made 10 years ago, and there is no response to the 6 year old bug report by the author. My guess is that the author is no longer supporting this module. You could attempt to send him an email (address provided in the module POD).

In reply to Re: PDL::IO::Grib build fail by toolic
in thread PDL::IO::Grib build fail by digdoug

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