Automatically start xmodmap when I first log in

oni/home/services/xmodmap.scm

@@ -13,6 +13,9 @@
   (package
    (package xmodmap)
    "Package to use for setting Xmodmap")
+  (auto-start?
+   (boolean #t)
+   "Should xmodmap be started automatically")
   (pointer
    (list '())
    "List of numbers indicating the order of numbers")
@@ -28,24 +31,31 @@
          "")
      (string-join (home-xmodmap-configuration-extra config) "\n" 'suffix))))
 
-(define (xmodmap-home-files config)
-  `(("Xmodmap" ,(mixed-text-file
+(define (xmodmap-home-config-file config)
+  (mixed-text-file
    "Xmodmap"
-                 (serialize-xmodmap-config config)))))
+   (serialize-xmodmap-config config)))
 
 (define (add-xmodmap-packages config)
   (list (home-xmodmap-configuration-package config)))
 
+(define (launch-xmodmap-gexp config)
+  (let ((xmodmap (home-xmodmap-configuration-package config)))
+    (if (home-xmodmap-configuration-auto-start? config)
+        #~(system* #$(file-append xmodmap "/bin/xmodmap")
+                   #$(xmodmap-home-config-file config))
+        #~"")))
+
 (define home-xmodmap-service-type
   (service-type
    (name 'home-xmodmap)
    (extensions
     (list (service-extension
-           home-files-service-type
-           xmodmap-home-files)
-          (service-extension
            home-profile-service-type
-           add-xmodmap-packages)))
+           add-xmodmap-packages)
+          (service-extension
+           home-run-on-first-login-service-type
+           launch-xmodmap-gexp)))
    (compose identity)
    (default-value (home-xmodmap-configuration))
    (description "Install and configure Xmodmap.")))