On Wed, Aug 28, 2019 at 9:38 AM Ludovic Courtès <ludo@gnu.org> wrote:

> > +      (add-after 'unpack 'unpack-googletest
> > +        (lambda* (#:key inputs #:allow-other-keys)
> > +          (copy-recursively (assoc-ref inputs "googletest-source")
> > +                            "UnitTests/googletest")
>
> Would it work to simply pass ‘googletest’ as an input?
> If not, this approach is fine IMO.

Unfortunately, no, the build process expects to see the googletest
source in a sub-module directory.

Attached a new patch with the fixes you suggested.