On Wed, Mar 25, 2015 at 10:20 PM, Ludovic Courtès <ludo@gnu.org> wrote:
> Could you try ‘guix build ghc -s i686-linux -K’ and then investigate
> from there?  It might be clearer what needs to be patched.

That was indeed very useful! Thanks for making me discover the '-s' option :-)

The attached patch should fix the problem.

Regards,
Fede