Posting an issue as discussed here: Homebrew/homebrew-core#66598 (comment)

In summary, it would be useful for package managers like Homebrew if it were possible to turn off all automatic fetching behaviour. If this were the default, then even better.

At the moment it seems to only be possible to do this for zlib and zstd:

https://github.com/nmoinvaz/minizip/blob/318e848843667f982f81dbcb72334e415ba482a5/CMakeLists.txt#L33-L34

I'll also mention the variable seems to be named the opposite of its description, which is confusing.

Thanks for the work you've put into minizip!