bug#40652: GDM does not starts after April 10 system reconfigure

[R Veera Kumar]

I am using guix.git master branch.

I did guix system reconfigure on April 10 with gnome, mate, xfce and 
enlightenment service-types.
It was working. And next day I again did that and gdm does not starts anymore.

Initial console says:

New session c1 of user gdm.
Removed session c1.


/var/log/messages says:

gdm: Child process -325 was already dead.


/var/log/gdm/greeter.log says:

(EE)
Fatal server error:
(EE) Cannot open log file "/var/lib/gdm/.local/share/xorg/Xorg.pid-330.log"
(EE)
(EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.
(EE)
Unable to run X server

Any help would be appreciated!

Veera