Hi,
thanks for help

I have now got:

> (service home-redshift-service-type
>                      (home-redshift-configuration
>                       (location-provider 'manual)
>                       (latitude 52.5)        ;northern hemisphere
>                       (longitude 13.5)))     ;Berlin
>             (modify-services %desktop-services
>               (guix-service-type
>                    config => (guix-configuration
>                      (inherit config)
>                      (extra-options (list "--gc-keep-derivations=yes" "--gc-keep-outputs=yes"))))
>             (sane-service-type _ => sane-backends)))))
....................................................................................
but running system reconfigure..
I am getting now another message:

> ice-9/boot-9.scm:1685:16: In procedure raise-exception:
> error: home-redshift-service-type: unbound variable
.................................................................................
I copied the "redshift-service-type" part
from the manual into my config.scm
so I don’t find the "unbound variable".

Kind regards

Gottfried



Am 09.03.23 um 18:20 schrieb Julien Lepiller:
> You have an extra closing parenthesis at the end of this line:
> 
> (extra-options (list "--gc-keep-derivations=yes" "--gc-keep-outputs=yes")))))
> 
> Remove one and adjust next lines if needed :)
> 

>>                         %base-initrd-modules)))
>>