bug#25430: `guix system reconfigure' fails with "symlink: File exists"

[Ludovic Courtès]

Arun Isaac <address@hidden> skribis:

> `guix system reconfigure' fails on my machine with the following

Could you send your GuixSD config?

>    ?: 0 [symlink 
> "/gnu/store/f4mfsyzqsqccfh22z0md1s1jsk1m79mw-udisks-2.1.8/share/dbus-1/system-services/org.freedesktop.UDisks2.service"
>  ...]
>
> ERROR: In procedure symlink:
> ERROR: In procedure symlink: File exists
> builder for 
> `/gnu/store/dywvmn331drm2j6m474vbycdyiljnc4k-dbus-system-services.drv' failed 
> with exit code 1

This may be the result of adding UDisks D-Bus services more than once.

Ludo’.