is( $mm->{NAME}, 'Big::Fat::Dummy', 'NAME' );
is( $mm->{VERSION}, 0.01, 'VERSION' );
-my $config_prefix = $^O eq 'VMS' ? VMS::Filespec::unixify($Config{prefix})
- : $Config{prefix};
+my $config_prefix = $^O eq 'VMS'
+ ? VMS::Filespec::unixify($Config{installprefixexp})
+ : $Config{installprefixexp};
is( $mm->{PREFIX}, $config_prefix, 'PREFIX' );
is( !!$mm->{PERL_CORE}, !!$ENV{PERL_CORE}, 'PERL_CORE' );