diff --git a/home/ironbar.nix b/home/ironbar.nix
index 132f8703..190ca2b7 100644
--- a/home/ironbar.nix
+++ b/home/ironbar.nix
@@ -1,5 +1,8 @@
-{ config, ... }:
+{ config, lib, ... }:
 
+let
+  inherit (lib) singleton;
+in
 {
   xdg.configFile."ironbar/config.json".text = builtins.toJSON {
     name = "main";
@@ -23,20 +26,18 @@
       }
     ];
 
-    center = [
-      {
-        type = "launcher";
-        icon_size = 39;
-        favorites = [
-          "librewolf"
-          "kitty"
-          "thunar"
-          "org.qutebrowser.qutebrowser"
-          "anki"
-          "Element"
-        ];
-      }
-    ];
+    center = singleton {
+      type = "launcher";
+      icon_size = 39;
+      favorites = [
+        "librewolf"
+        "kitty"
+        "thunar"
+        "org.qutebrowser.qutebrowser"
+        "anki"
+        "Element"
+      ];
+    };
 
     end = [
       {
diff --git a/modules/dual-function-keys.nix b/modules/dual-function-keys.nix
index 51396bab..ae24df52 100644
--- a/modules/dual-function-keys.nix
+++ b/modules/dual-function-keys.nix
@@ -1,7 +1,7 @@
 { pkgs, lib, ... }:
 
 let
-  inherit (lib) getExe;
+  inherit (lib) getExe singleton;
   inherit (builtins) toJSON;
   inherit (pkgs) interception-tools;
   inherit (pkgs.interception-tools-plugins) dual-function-keys;
@@ -13,21 +13,19 @@ in
     enable = true;
     plugins = [ dual-function-keys ];
 
-    udevmonConfig = toJSON [
-      {
-        JOB = /* bash */ ''
-          ${interception-tools}/bin/intercept -g $DEVNODE |
-          ${getExe dual-function-keys} -c /etc/${configFile} |
-          ${interception-tools}/bin/uinput -d $DEVNODE
-        '';
+    udevmonConfig = toJSON (singleton {
+      JOB = /* bash */ ''
+        ${interception-tools}/bin/intercept -g $DEVNODE |
+        ${getExe dual-function-keys} -c /etc/${configFile} |
+        ${interception-tools}/bin/uinput -d $DEVNODE
+      '';
 
-        DEVICE = {
-          EVENTS = {
-            EV_KEY = [ "KEY_CAPSLOCK" "KEY_ESC" ];
-          };
+      DEVICE = {
+        EVENTS = {
+          EV_KEY = [ "KEY_CAPSLOCK" "KEY_ESC" ];
         };
-      }
-    ];
+      };
+    });
   };
 
   environment.etc.${configFile}.text = toJSON {