diff --git a/system/modules/system/nix.nix b/system/modules/system/nix.nix
index 6946fae..b1c7f18 100644
--- a/system/modules/system/nix.nix
+++ b/system/modules/system/nix.nix
@@ -19,33 +19,32 @@ in
       default = "30d";
     };
   };
-  config = lib.mkMerge [
-    (lib.mkIf cfg.allowUnfree { nixpkgs.config.allowUnfree = true; })
-    ({
-      nix = {
-        # Enable Flakes
-        settings.experimental-features = [
-          "nix-command"
-          "flakes"
-        ];
+  config = {
+    nixpkgs.config.allowUnfree = cfg.allowUnfree;
 
-        # Enable periodic nix store optimization
-        optimise.automatic = true;
+    nix = {
+      # Enable Flakes
+      settings.experimental-features = [
+        "nix-command"
+        "flakes"
+      ];
 
-        # Enable weekly garbage collection. Delete generations that are older than two weeks.
-        gc = {
-          automatic = true;
-          dates = "weekly";
-          options = "--delete-older-than ${cfg.retentionPeriod}";
-        };
+      # Enable periodic nix store optimization
+      optimise.automatic = true;
 
-        # Configure NixOS to use the same software channel as Flakes
-        registry = lib.mapAttrs (_: value: { flake = value; }) inputs;
-        nixPath = lib.mapAttrsToList (key: value: "${key}=${value.to.path}") config.nix.registry;
+      # Enable weekly garbage collection. Delete generations that are older than two weeks.
+      gc = {
+        automatic = true;
+        dates = "weekly";
+        options = "--delete-older-than ${cfg.retentionPeriod}";
       };
 
-      # Support for standard, dynamically-linked executables
-      programs.nix-ld.enable = true;
-    })
-  ];
+      # Configure NixOS to use the same software channel as Flakes
+      registry = lib.mapAttrs (_: value: { flake = value; }) inputs;
+      nixPath = lib.mapAttrsToList (key: value: "${key}=${value.to.path}") config.nix.registry;
+    };
+
+    # Support for standard, dynamically-linked executables
+    programs.nix-ld.enable = true;
+  };
 }