"guix copy" cannot deal with > 32-bit integers

[zimoun]

Hi,

I do not understand why I get this:

--8<---------------cut here---------------start------------->8---
$ ssh chouib -t guix build hello
/gnu/store/a462kby1q51ndvxdv3b6p0rsixxrgx1h-hello-2.10
Connection to x.x.x.x closed.

$ guix copy --from=chouib /gnu/store/a462kby1q51ndvxdv3b6p0rsixxrgx1h-hello-2.10
retrieving 1 store item from 'x.x.x.x'...
guix copy: error: implementation cannot deal with > 32-bit integers
--8<---------------cut here---------------end--------------->8---

What do I miss?  This message comes from 'serialise.cc' therefore is
it a daemon issue?

Thanks in advance for any explanations.

All the best,
simon