Hello,

sorry to resurrect an old message but I've the same issue reported on
Nov 2023 by TakeV and the provided solution does not work for me

Saku Laesvuori <saku@laesvuori.fi> writes:

[...]

>> Error setting USB device node ACL: 'Error PoliciKit error: 
>> GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Action 
>> org.spice-space.lowlevelusbaccess is not registered' (0)

same error here

[...]

> (operating-system
>   ...
>   (services
>     ...
>     (simple-service 'spice-polkit polkit-service-type (list spice-gtk))))

I've also added that simple-service to my os config, this is a snippet:

--8<---------------cut here---------------start------------->8---

[...]

	(services
	 (append %desktop-services
		 (list
		  ;; libvirt and virtlog daemons
		  (service libvirt-service-type
			   (libvirt-configuration
			    (unix-sock-group "libvirt")
			    (tls-port "16555")))

		  (service virtlog-service-type
			   (virtlog-configuration
			    (max-clients 1000)
			    (max-size 5)
			    (max-backups 9)))

		  (service xfce-desktop-service-type)
		  
		  (set-xorg-configuration
		   (xorg-configuration
		    (keyboard-layout keyboard-layout)))
		  
		  ;; extend polkit for spice-gtk
		  (simple-service 'spice-polkit polkit-service-type (list spice-gtk))

[...]

--8<---------------cut here---------------end--------------->8---

but when I try to apply it I get this error:

--8<---------------cut here---------------start------------->8---

g@ken ~$ sudo guix system reconfigure /etc/config.scm 
Backtrace:
          18 (primitive-load "/home/g/.config/guix/current/bin/guix")
In guix/ui.scm:
   2312:7 17 (run-guix . _)
  2275:10 16 (run-guix-command _ . _)
In ice-9/boot-9.scm:
  1752:10 15 (with-exception-handler _ _ #:unwind? _ # _)
In guix/status.scm:
    859:3 14 (_)
    839:4 13 (call-with-status-report _ _)
In guix/scripts/system.scm:
   1311:4 12 (_)
In ice-9/boot-9.scm:
  1752:10 11 (with-exception-handler _ _ #:unwind? _ # _)
In guix/store.scm:
   684:37 10 (thunk)
   1325:8  9 (call-with-build-handler #<procedure 7f6774ac25a0 at g…> …)
  2205:25  8 (run-with-store #<store-connection 256.100 7f676508d0f0> …)
In guix/scripts/system.scm:
    853:2  7 (_ _)
    727:8  6 (_ #<store-connection 256.100 7f676508d0f0>)
In gnu/system.scm:
  1335:19  5 (operating-system-derivation _)
   870:11  4 (operating-system-services #<<operating-system> kernel:…>)
   904:20  3 (services _)
In /etc/config.scm:
   120:48  2 (services #<<operating-system> kernel: #<package linux-…>)
In ice-9/boot-9.scm:
  1685:16  1 (raise-exception _ #:continuable? _)
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
error: polkit-service-type: unbound variable

--8<---------------cut here---------------end--------------->8---

AFAIU polkit-service-type is defined in (gnu services desktop) and I'm
including that module: what am I doing wrong please?

Thanks! Gio'

-- 
Giovanni Biscuolo

Xelera IT Infrastructures