system reconfigure fails when adding fwupd-service-type

[Gabor Gero via]

Hello,

After adding the (service fwupd-service-type) line to my config, 
reconfiguring fails at building the dbus-system-services derivation with 
the following backtrace:

find-files: /gnu/store/3n6jhkjsdyms1ppadbazbqc723rn8lch-gdm-48.0/share/dbus-1/: 
No such file or directory
Backtrace:
           3 (primitive-load "/gnu/store/6x9zqzdpyb534qbmsvg2lk03sll…")
In ice-9/eval.scm:
    619:8  2 (_ #f)
In srfi/srfi-1.scm:
    634:9  1 (for-each #<procedure 7ffff76a9260 at ice-9/eval.scm:3…> …)
In unknown file:
           0 (symlink "/gnu/store/pmbxhjig6slwq8bv0ixjwnf2an0ccwca-…" …)

ERROR: In procedure symlink:
In procedure symlink: File exists

Removing the line fixes the issue. I'm on commit 1ee1724.

Thanks in advance,

Gábor Gerő