diff --git a/nixos/modules/services/networking/scion/scion-control.nix b/nixos/modules/services/networking/scion/scion-control.nix
index c3a22039aa52..b86f1ef26b35 100644
--- a/nixos/modules/services/networking/scion/scion-control.nix
+++ b/nixos/modules/services/networking/scion/scion-control.nix
@@ -24,7 +24,7 @@ let
       level = "info";
     };
   };
-  configFile = toml.generate "scion-control.toml" (defaultConfig // cfg.settings);
+  configFile = toml.generate "scion-control.toml" (recursiveUpdate defaultConfig cfg.settings);
 in
 {
   options.services.scion.scion-control = {
diff --git a/nixos/modules/services/networking/scion/scion-daemon.nix b/nixos/modules/services/networking/scion/scion-daemon.nix
index 53b56841c392..a9c0c80f101f 100644
--- a/nixos/modules/services/networking/scion/scion-daemon.nix
+++ b/nixos/modules/services/networking/scion/scion-daemon.nix
@@ -21,7 +21,7 @@ let
       level = "info";
     };
   };
-  configFile = toml.generate "scion-daemon.toml" (defaultConfig // cfg.settings);
+  configFile = toml.generate "scion-daemon.toml" (recursiveUpdate defaultConfig cfg.settings);
 in
 {
   options.services.scion.scion-daemon = {
diff --git a/nixos/modules/services/networking/scion/scion-dispatcher.nix b/nixos/modules/services/networking/scion/scion-dispatcher.nix
index 05d1fd0782af..9118ebefa18f 100644
--- a/nixos/modules/services/networking/scion/scion-dispatcher.nix
+++ b/nixos/modules/services/networking/scion/scion-dispatcher.nix
@@ -15,7 +15,7 @@ let
       level = "info";
     };
   };
-  configFile = toml.generate "scion-dispatcher.toml" (defaultConfig // cfg.settings);
+  configFile = toml.generate "scion-dispatcher.toml" (recursiveUpdate defaultConfig cfg.settings);
 in
 {
   options.services.scion.scion-dispatcher = {
diff --git a/nixos/modules/services/networking/scion/scion-router.nix b/nixos/modules/services/networking/scion/scion-router.nix
index 488dfd12b3a5..3579005a429e 100644
--- a/nixos/modules/services/networking/scion/scion-router.nix
+++ b/nixos/modules/services/networking/scion/scion-router.nix
@@ -11,7 +11,7 @@ let
       config_dir = "/etc/scion";
     };
   };
-  configFile = toml.generate "scion-router.toml" (defaultConfig // cfg.settings);
+  configFile = toml.generate "scion-router.toml" (recursiveUpdate defaultConfig cfg.settings);
 in
 {
   options.services.scion.scion-router = {