Disable extra fields?

[ghost]

Hi, all. Is there an easy way to disable the extra fields entirely? What I'm looking for is something similar to what you get when using the -X option with command-line zip.

I'm trying to create epub documents. An epub container is just a zip file, but unfortunately the extra file attributes are not supported (this is arguably broken, but it's not within my control). zip -X works fine, but rubyzip doesn't.

[atomical]

I'm still seeing this issue.