How to compile Jigasi on s390x platform

[tseeling]

I'd like to compile and run Jigasi on IBM s390x platform (Redhat Linux).
Maven compiles and builds a .zip file but it contains a libunix.so file with x86_64.
Mainly a cosmetic problem: the zip filename contains x64 but I'd like to have ${os.arch} here (s390x). How would I do that?
I cannot find a way to provide that library .so for s390x architecture and I don't see where it gets downloaded.
How can I build and include the s390x version into the Jigasi archive?
Can I get some pointers or suggestions please?

[damencho]

You need to fix the dependencies to support that. I would day for now this is not supported.

[tseeling]

You need to fix the dependencies to support that. I would say for now this is not supported.

Can you give me a pointer what dependency that is? I cannot even find any mention how that "libunix.so" is built during the maven run.
I can compile anything, e.g. built s6 for s390x from scratch, but I cannot find what I need for this library.