You know, Tobias! Just for experiment I've add (al utils) and guix cuss out:

(use-modules (gnu) (gnu system nss)
             (gnu system locale) ;;for locale-definition
             (gnu services desktop)
             ;;(gnu services dns) ;;for dnsmasq
             (srfi srfi-1) ;;for remove function
             (gnu services networking) ;;for remove ntp
             (gnu services avahi) ;;for remove avahi
             (gnu services xorg)
             ;;(gnu services databases);;for postgres
             (gnu packages admin) ;;for wpa_supplicant
             (al utils)
)
# guix system reconfigure /etc/config.scm
guix system: error: failed to load '/etc/config.scm':
ice-9/boot-9.scm:2803:6: In procedure resolve-interface:
no code for module (al utils)


What is wrong here? How to use guile modules?


Mar 16, 2019, 4:00 PM by somebody@not-sent-or-endorsed-by.tobias.gr:

> Zvavko,
>
> znavko wrote:
>
>> # guix system reconfigure /etc/config.scm
>> /etc/config.scm:97:26: error: comma-separated: unbound variable
>> hint: Did you forget a `use-modules' form?
>>
>
> […]
>
>> Mentioned github page has no any use-modules string that can help.
>>
>
> Look again.  From system-config/os-main.scm:
>
>  (al utils)
>
> And indeed, guile/modules/al/utils.scm has:
>
>  (define (comma-separated . strings)
>  "Return string by concatenating STRINGS with commas."
>  (mapconcat identity strings ","))
>
> You can copy the definition to your own configuration, or just replace it with the (trivial) MAPCONCAT call directly, or just use a comma-separated string to begin with.
>
> Kind regards,
>
> T G-R
>