nixos: add genode.init.verbose enable option

nixos-modules/genode-init.nix

@@ -13,6 +13,8 @@ in {
 
   options.genode.init = {
 
+    verbose = mkEnableOption "verbose logging";
+
     configFile = mkOption {
       description = ''
         Dhall configuration of this init instance after children have been merged.
@@ -92,15 +94,20 @@ in {
       '';
     }) cfg.subinits;
 
-    configFile = pkgs.writeText "init.dhall" ''
+    configFile = let
+
+      children =
+        lib.mapAttrsToList (name: value: ", `${name}` = ${value.configFile}")
+        cfg.children;
+
+    in pkgs.writeText "init.dhall" ''
       let Genode = env:DHALL_GENODE
       let baseConfig = ${cfg.baseConfig}
 
-      in baseConfig with children = baseConfig.children # toMap {${
-        concatMapStrings
-        (name: ", `${name}` = (${cfg.children.${name}.configFile}) ")
-        (builtins.attrNames cfg.children)
-      } }
+      in baseConfig // {
+        , verbose = ${if config.genode.init.verbose then "True" else "False"}
+        , children = baseConfig.children # toMap {${toString children} }
+      }
     '';
 
   };