Add default settings for systems

flake.nix

@@ -44,6 +44,10 @@
     ) // {
       nixosConfigurations =
         let
+          default = {
+            dualBoot = false;
+            timeZone = null;
+          };
           systems = [
             {
               name = "nixos";
@@ -59,7 +63,7 @@
                   inherit system;
 
                   modules = [
-                    ({ ... }: { config._module.args = { machineConfig = config; }; })
+                    ({ ... }: { config._module.args = { machineConfig = default // config; }; })
                     sops-nix.nixosModules.sops
                     ./lib/configuration.nix
 

lib/configuration.nix

@@ -25,5 +25,8 @@
 
     # Networking
     networking.hostName = machineConfig.name;
+
+    # Set time zone
+    time.timeZone = machineConfig.timeZone;
   };
 }