IO::Compress::Zip cannot write directories (without jumping through a lot of hoops) by design.

I do have another module, called Archive::Zip::SimpleZip (it actually uses IO::Compress::Zip under the hood), that can create directories.

Here is a example of how to use it

use strict ;
use warnings;
use Archive::Zip::SimpleZip;

my @dirs = ("WEB-INF");

my $zip = Archive::Zip::SimpleZip->new("test.zip");
$zip->add($_) for @dirs;
$zip->close();
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and here is what the commandline unzip this about the zip file

$ unzip -l test.zip 
Archive:  test.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
        0  02-03-2016 12:58   WEB-INF/
---------                     -------
        0                     1 file
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