Weirdly enough, this is not documented in ExtUtils::MakeMaker, but conveniently enough, EUMM uses the feature in its Makefile.PL:

    META_MERGE => {
        no_index => {
            package   => [ 'DynaLoader', 'in' ],    # "in" is a PAUSE 
+misparse.
            directory => [ 'bundled', 'my' ],
        },
        ...
    }
[download]

Thanks Corion.
I did search the EU::MM docs for 'index' - but gave up when no hits were found.

Cheers,
Rob

This is why I like to grep :)

http://search.cpan.org/grep?cpanid=BINGOS&release=ExtUtils-MakeMaker-6.98&string=no_index&i=1&n=1&C=9

:) Now for the circle :) https://metacpan.org/pod/ExtUtils::MakeMaker#META_MERGE ... https://metacpan.org/pod/ExtUtils::MakeMaker#Module-Meta-Data-META-and-MYMETA -> https://metacpan.org/pod/CPAN::Meta::Spec#no_index

  no_index => {
    file      => [ 'My/Module.pm' ],
    directory => [ 'My/Private' ],
    package   => [ 'My::Module::Secret' ],
    namespace => [ 'My::Module::Sample' ],
  }
[download]

The circle is complete :)