On Sat, 2021-04-03 at 17:28 +0200, Hartmut Goebel wrote:
> * gnu/packages/networking.scm(python-pysctp): New variable.
> ---
>  gnu/packages/networking.scm | 34 ++++++++++++++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
> 
> [...]
> +     #:phases
> +     (modify-phases %standard-phases
> +       (add-after 'unpack 'patch-setup.py
> +         (lambda _
> +           (substitute* "setup.py"
> +             (("include_dirs\\s*=.*")
> +              (string-append "include_dirs = ['.'] + '"
> +                             (getenv "C_INCLUDE_PATH") "'.split(':'),"))
> +             (("library_dirs\\s*=.*")
> +              (string-append "library_dirs = '"
> +                             (getenv "LIBRARY_PATH") "'.split(':'),")))
> +           #t)))))

Phases do not need to return #t anymore.  IIUC the warning message that results
if it is left out has been removed on core-updates.

Greetings,
Maxime.