lets try exports

system/clients/otto.scm

@@ -31,7 +31,9 @@
   #:use-module (gnu packages scanner)
   #:use-module (gnu packages dns)
   #:use-module (gnu services shepherd)
-  #:use-module (gnu services base))
+  #:use-module (gnu services base)
+  #:export (otto-operating-system))
+
 
 ; (define (nvidia-insmod-shepherd-service config)
 ;   (list (shepherd-service
@@ -50,7 +52,7 @@
 ;      (list (service-extension shepherd-root-service-type nvidia-insmod-shepherd-service)))
 ;    (default-value '())))
 
-(define-public otto-operating-system
+(define otto-operating-system
   (operating-system
     (inherit base-desktop-system)
     (host-name "otto")