Move stateVersion variables into per-machine config files

system/Northstar.nix

@@ -1,4 +1,8 @@
-{ ... }:
+{ username, ... }:
 {
   imports = [ ./laptop.nix ];
+  home-manager.users.${username} = {
+    home.stateVersion = "23.05";
+  };
+  system.stateVersion = "23.05";
 }

system/Ronin.nix

@@ -3,6 +3,7 @@
   imports = [ ./laptop.nix ];
   home-manager.users.${username} = {
     imports = [ ./home/work.nix ];
+    home.stateVersion = "23.05";
   };
   boot.initrd = {
     secrets = {
@@ -13,6 +14,7 @@
       keyFile = "/crypto_keyfile.bin";
     };
   };
+  system.stateVersion = "23.05";
   environment = {
     etc."ppp/options".text = ''
       ipcp-accept-remote

system/Tone.nix

@@ -3,6 +3,7 @@
   imports = [ ./desktop.nix ];
   home-manager.users.${username} = {
     imports = [ ./home/work.nix ];
+    home.stateVersion = "23.05";
   };
   boot = {
     loader.efi.efiSysMountPoint = "/boot/efi";
@@ -16,6 +17,7 @@
       };
     };
   };
+  system.stateVersion = "23.05";
   environment = {
     etc."ppp/options".text = ''
       ipcp-accept-remote

system/Vanguard.nix

@@ -8,7 +8,9 @@
   imports = [ ./desktop.nix ];
   environment.sessionVariables.MANGOHUD = 1;
   home-manager.users.${username} = {
-    home.packages = with pkgs; [
+    home = {
+      stateVersion = "23.05";
+      packages = with pkgs; [
         krita
         kdenlive
         helvum
@@ -24,6 +26,7 @@
         cartridges
         prismlauncher
       ];
+    };
     programs.obs-studio = {
       enable = true;
       plugins = with pkgs.obs-studio-plugins; [
@@ -69,6 +72,7 @@
     };
     steam-hardware.enable = true;
   };
+  system.stateVersion = "23.05";
   programs = {
     gamemode.enable = true;
     steam = {

system/default.nix

@@ -80,9 +80,7 @@
       })
     ];
   };
-  system = {
-    stateVersion = "23.05";
-    autoUpgrade = {
+  system.autoUpgrade = {
     enable = true;
     persistent = true;
     allowReboot = false;
@@ -96,7 +94,6 @@
       "https://nix.xenia.me.uk"
     ];
   };
-  };
   systemd.services = lib.mkIf config.system.autoUpgrade.enable {
     nixos-upgrade.serviceConfig = {
       CPUQuota = "75%";
@@ -152,7 +149,6 @@
       imports = [ ./home/default.nix ];
       home = {
         inherit username;
-        stateVersion = "23.05";
         homeDirectory = "/home/${username}";
       };
     };