Using cross-compiled packages (e.g. x86_64-linux-gnux32 on x86_64-linux-gnu)

[Sven Hartrumpf]

Hello.

I want to cross-compile some packages for the x32 ABI
(because it can speed up one of my performance-critical applications).
Thanks to Efraim's recent changes, I can simply use

  # guix build lz4 --target=x86_64-linux-gnux32
(lz4 is only a simple example, not the one which is important for me :-)

What is a good or simple way to use the resulting binaries
(which I find under /gnu/store/.../bin/lz4)?
My user-land binaries are mainly x86_64-linux-gnu, only few will be
x86_64-linux-gnux32.

Greetings
Sven