"bad use of syntactic keyword" - after "sudo guix system reconfigure /etc/config.scm"

[Gottfried <gottfried@posteo.de>]

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Hi Guixers,

I got into trouble.

After inserting:
(guix-service-type config => (guix-configuration (inherit config) 
(extra-options (list "--gc-keep-derivations=yes" 
"--gc-keep-outputs=yes")))))
in my config.scm

I can't do a:
sudo guix system reconfigure /etc/config.scm

It said "invalid field specifier.

gfp@Tuxedo ~$ sudo guix system reconfigure /etc/config.scm
Passwort:
/etc/config.scm:25:2: Fehler: (services (append (list (service 
mate-desktop-service-type) (service enlightenment-desktop-service-type) 
(service cups-service-type (cups-configuration (web-interface? #t) 
(extensions (list cups-filters hplip)))) (service openssh-service-type) 
(service tor-service-type) (set-xorg-configuration (xorg-configuration 
(keyboard-layout keyboard-layout)))) (modify-services %desktop-services 
(sane-service-type _ => sane-backends))) (guix-service-type config => 
(guix-configuration (inherit config) (extra-options (list 
"--gc-keep-derivations=yes" "--gc-keep-outputs=yes"))))): invalid field 
specifier


than I deleted one of two empty lines (before  (bootloader.......)

Then I did again a:

gfp@Tuxedo ~$ sudo guix system reconfigure /etc/config.scm
Passwort:
guix system: Fehler: =>: bad use of '=>' syntactic keyword

It said: bad use of systactic keyword




Could anybody help to check my config.scm?

;; This is an operating system configuration generated
;; by the graphical installer.

(use-modules (gnu))
(use-package-modules cups scanner)
(use-service-modules cups desktop networking ssh xorg)

(operating-system
   (locale "de_DE.utf8")
   (timezone "Europe/Berlin")
   (keyboard-layout (keyboard-layout "de"))
   (host-name "Tuxedo")
   (users (cons* (user-account
                   (name "gfp")
                   (comment "Gfp")
                   (group "users")
                   (home-directory "/home/gfp")
                   (supplementary-groups
                     '("wheel" "netdev" "audio" "video")))
                 %base-user-accounts))
   (packages
     (append
       (list (specification->package "nss-certs"))			
       %base-packages))
   (services
     (append
       (list (service mate-desktop-service-type)
             (service enlightenment-desktop-service-type)
			(service cups-service-type
				(cups-configuration
					(web-interface? #t)
					(extensions (list cups-filters hplip))))			
			(service openssh-service-type)
             (service tor-service-type)
             (set-xorg-configuration
               (xorg-configuration
                 (keyboard-layout keyboard-layout))))
             (guix-service-type
                 config => (guix-configuration
                 (inherit config)
                 (extra-options (list "--gc-keep-derivations=yes" 
"--gc-keep-outputs=yes"))))
       (modify-services %desktop-services
		(sane-service-type _ => sane-backends))))

   (bootloader
     (bootloader-configuration
       (bootloader grub-efi-bootloader)
       (target "/boot/efi")
       (keyboard-layout keyboard-layout)))
   (swap-devices
     (list (uuid "51d5cd20-4513-4a02-9e35-df4338eccaa0")))
   (file-systems
     (cons* (file-system
              (mount-point "/boot/efi")
              (device (uuid "BB77-FE3B" 'fat32))
              (type "vfat"))
            (file-system
              (mount-point "/")
              (device
                (uuid "4fb0ed7c-61ab-45eb-be0b-ff527b320e6d"
                      'ext4))
              (type "ext4"))
            %base-file-systems)))


thanks in advance for your help, without that I would not be able to use 
Guix.

Gottfried

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