Subject: Re: [bug#44900] [PATCH] services: unattended-upgrade: Add 'search-paths' field.

From: Ludovic Courtès <[email-masked]>
Date: Mon, 07 Dec 2020 21:58:47 +0100

Hi,

Lars-Dominik Braun <[email-masked]> skribis:

> This snippet:
>
> ---snip---
> (simple-service 'guix-channels etc-service-type
>    (list `("guix/channels.scm" , (scheme-file "channels.scm" %guix-channels))))
> ---snap---
>
> Causes this error when reconfiguring:
>
> ---snip---
> activating system...
> The following derivation will be built:
>    /gnu/store/qqp3vz7r6i6fa7wckzdxs1613gvww4b6-switch-to-system.scm.drv
>
> building /gnu/store/qqp3vz7r6i6fa7wckzdxs1613gvww4b6-switch-to-system.scm.drv...
> making '/gnu/store/ykfn25vpvgmjkq4l8xygs7fwabgkgp2s-system' the current system...
> setting up setuid programs in '/run/setuid-programs'...
> populating /etc from /gnu/store/mdpbph8cpgwydy3hwfq0q6sk44bfbk93-etc...
> guix system: error: symlink: File exists: "/etc/guix"
> ---snap---
>
> /gnu/store/mdpbph8cpgwydy3hwfq0q6sk44bfbk93-etc looks correct to me, i.e. it
> has a guix subdirectory with a correct channels.scm file in it.

Yes, somebody else reported that problem recently (and proposed a
solution I think, was it on guix-devel?).  The issue here is that
/etc/guix is also partly stateful, so there’s ‘activation-service-type’,
‘etc-service-type’, and manual changes say to /etc/guix/machines.scm,
are conflicting.

Ludo’.