{
    my $repo = $DB->get("epel") or return '';
    my @exclude = split /[;,]/, ($repo->prop('Exclude') || '');
    push @exclude, 'php-horde-horde' unless (grep {$_ eq 'php-horde-horde'} @exclude);
    $repo->set_prop('Exclude', join(',', @exclude));
}