> +                         (with-directory-excursion "squashfs-root"
> +                           (when (and (file-exists? (string-append bin
> +                                                                   "/guile"))
> +                                      (file-exists? "var/guix/db/db.sqlite")
> +                                      (string=? (string-append #$%bootstrap-guile "/bin")
> +                                                (pk 'binlink (readlink bin)))
> +                                      (string=? (string-append #$profile "/bin")
> +                                                (pk 'guilelink (readlink "bin"))))
> +                             (mkdir #$output))))))))

"pk" here on purpose?  Can't hurt in a test, I suppose...

LGTM!