Is there an equivalent of NO_EXTRACT?

[Piotr Kubaj]

I'm a maintainer of a few ports. For the next update I'm preparing, I
want to make it possible to download some addons via options. The thing
is, they are downloaded as-is. They are not meant to be extracted
(although they are zips), since it's the program itself that manages it.
Is there such a possibility?

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