Subject: bug#26669: [PATCH 2/7] gnu: Add dvd+rw-tools.

From: Danny Milosavljevic <[email-masked]>
Date: Wed, 26 Apr 2017 19:15:49 +0200

On Wed, 26 Apr 2017 18:30:33 +0200
Thomas Danckaert <[email-masked]> wrote:

> +           (lambda*  (#:key inputs #:allow-other-keys)
> +             ;; We use sed --in-place because substitute* cannot handle the
> +             ;; character encoding used by growisofs.c.
> +             (system* "sed" "-i" "-e"
> +                      (string-append
> +                       "s,\"mkisofs\","
> +                       "\"" (assoc-ref inputs "cdrtools") "/bin/mkisofs\",")
> +                      "growisofs.c")
> +             #t)))))

Maybe rather use

  (zero? (system* ...))

instead of

  (system* ...)
  #t

Otherwise LGTM!