bug#26488: [PATCH] gnu: Add crawl.

[Danny Milosavljevic]

> Ah, I missed those because they are in make test and not make check.
> I tried to package them now, but the tests need to create a directory in
> home. This fails and I don't know how to handle this with guix.
> I need some help here.

         (add-before 'check 'set-check-up
           (lambda _
             (setenv "HOME" (getcwd)) ; or maybe /tmp or something
             #t))