fix cfg

module/etherpad/etherpad.nix

@@ -2,7 +2,7 @@
 
 {
   imports =  [ ./etherpad-pkg.nix ];
-  
+
   ###### interface
 
   options = {
@@ -23,7 +23,7 @@
 
   ###### implementation
 
-  config =  mkIf cfg.enable{
+  config =  mkIf config.etherpad.news2kindle.enable{
       environment.systemPackages = [pkgs.etherpad pkgs.nosdejs];
       systemd.services.etherpad = {
         description = "etherpad service";