Yes. I already provided that. use strict does not give an error with the code in my previous post.

use strict;
use warnings;

# ... Load config file ...

my $hostname = 'hosta';
my @host = do { no strict 'refs'; @$hostname };

foreach my $cnf (@host) {
   ...
}
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By the way, why are you using qw(...) to initialize a scalar. Don't you want
$host = q(...);
or the equivalent but more readable
$host = '...';