Network Manager Service

[rennes]

Hello,

I tested the 'network-manager-service' service on GNOME, and generated 
VM's with 'system vm-image'; and the test seems correct and functional.

To replace 'wicd-service' with 'network-manager-service' I have seen the 
email:
https://lists.gnu.org/archive/html/guix-devel/2015-11/msg00717.html

My question is, how can I export the 'wicd-service-type' service? and 
should I add 'network-manager-service' to my config.scm file?

If you add only 'network-manager-service' Guix says: "guix system: 
error: service' networking 'provided more than once", I think because 
'wicd-service' is already defined.

Thanks and happy day.