bug#10988: stable-2.0 failed to build on a Mac

[Eric Hanchrow]

> Sorry, we’re not seeing this on our builder at
> <http://hydra.nixos.org/jobset/gnu/guile-2-0>, which runs
> MacOS X 10.2.0.
>
> What OS version do you use?
>
> I must admit I’m pretty clueless.  :-/
>
> Thanks,
> Ludo’.

I'm using OS X 10.7.3.