It looks like 

$zip->addFile($file_name)->desiredCompressionLevel(0);

[download]
should do what you want.

PS Also, in wanted you aren't checking if you have found file or directory, and that may be the reason why addFile returns undef. Add something like 

return unless -f $File::Find::name;

[download]
in the beginning of wanted

In reply to Re: Archive::Zip changing compression on the fly by zwon
in thread Archive::Zip changing compression on the fly by cormanaz

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