trying to detect for NOT (CORE|EXSISTING) module names in Perl

detectNonCoreModules.pl

use 5.008_009;    # because Module::CoreList was first released with perl v5.8.9

#use strict;        # this line is irrelevant
#use warnings;      # this line is irrelevant
use feature qw(say);

#use FastGlob qw(glob); # this line is irrelevant
my @modules = qw(Encode FastGlob CGI Dummy);

#local @INC = qw(lib); # this line is irrelevant
my @list;
for (@modules) {
    eval { require $_ } or $@ =~ /^Can't locate ([A-Za-z][^\s]+)/;
    say "for $1" if my $name = $1;
    say my $res = qx"corelist $name";
    push @list, $name if $res =~ /$name was not in CORE/;
}

say 'results:';
say "- $_" for @list;

exit;