try another thing for idle-delay; foratting

home-configuration.scm

@@ -15,6 +15,7 @@
 	     (guix base64)
 	     (gnu home services)
 	     (gnu home services shells)
+	     (system foreign)
 	     (atlas home services dconf)
 	     )
 
@@ -60,6 +61,8 @@
       		     (current-tab "resources"))
 		   (org/gnome/desktop/interface
 		     (show-battery-percentage #t))
+		   (org/gnome/desktop/session
+      		     (idle-delay #f))
 		   (org/gnome/desktop/background
 		     (picture-uri-dark
 		       #$(file-fetch "https://www.teahub.io/photos/full/154-1542362_mac-os-mojave-screenshot.jpg"

system.scm

@@ -9,8 +9,15 @@
 
 ;; Indicate which modules to import to access the variables
 ;; used in this configuration.
-(use-modules (gnu) (nongnu packages linux))
-(use-service-modules cups desktop networking ssh xorg)
+(use-modules 
+  (gnu)
+  (nongnu packages linux))
+(use-service-modules
+  cups
+  desktop
+  networking
+  ssh
+  xorg)
 
 (operating-system
   (kernel linux)