Jean-Baptiste Volatier schreef op za 03-07-2021 om 17:41 [+0000]:
> +               (invoke "ln" "-s" (string-append (assoc-ref inputs "p7zip") "/bin/7z") "usr/bin/")

No need to shell out here. You can use the 'symlink' procedure,
see info '(guile)File System'.  Likewise for other uses of (invoke "ln" "-s" ...)

Greetings,
Maxime.