On 19-09-2022 19:47, Trevor Richards wrote:
> +      (arguments
> +       `(#:asd-systems '(:pamixer)
> +         #:phases
> +         ,#~(modify-phases %standard-phases
> +             (add-after 'unpack 'patch-pamixer
> +               (lambda _
> +                 (substitute* "pamixer.lisp"
> +                   (("\"pamixer \"")
> +                    (string-append
> +                     "\"" #$pamixer "/bin/pamixer \""))))))))

To support --with-input transformations, you can't do #$input, you have 
to do #$(this-package-input "pamixer") instead -- or better, don't 
depend on input labels, by using (search-input-file inputs 
"bin/pamixer") instead.

Greetings,
Maxime.