Hello Rennes, First of all thank you for helping with this!
Now on the problem, I suppose you are using the Guix version from my github repo? The wip-hurd branch is an older version which is probably why you have those issues. I created a new branch in my github repo called wip-hurd-native for you to clone. I cherry picked my latest commits from upstream guix master and core-updates into that branch. Please don't forget to place the latest guile tarball from ftp://snf-656163.vm.okeanos.grnet.gr/i586-gnu/2016/ in gnu/packages/bootstrap/i586-gnu as well. Can you try this and report back? Manolis