'system' has been renamed to/replaced by 'stdenv.hostPlatform.system'

aspects/ai.nix

@@ -5,7 +5,7 @@
     {
       environment.systemPackages =
         (with pkgs; [ ])
-        ++ (with inputs.nix-ai-tools.packages.${pkgs.system}; [
+        ++ (with inputs.nix-ai-tools.packages.${pkgs.stdenv.hostPlatform.system}; [
           claude-code
           claudebox
           opencode

aspects/desktop/niri.nix

@@ -48,7 +48,7 @@
         home = {
           packages = with pkgs; [
             xwayland-satellite
-            inputs.noctalia.packages.${pkgs.system}.default
+            inputs.noctalia.packages.${pkgs.stdenv.hostPlatform.system}.default
           ];
           sessionVariables.QT_QPA_PLATFORMTHEME = "gtk3";
         };

aspects/desktop/web.nix

@@ -9,7 +9,7 @@
     }:
     {
       environment.systemPackages = with pkgs; [
-        inputs.zen-browser.packages."${pkgs.system}".default
+        inputs.zen-browser.packages."${pkgs.stdenv.hostPlatform.system}".default
         bitwarden-desktop
         fragments
         nextcloud-client

shells/default.nix

@@ -6,7 +6,7 @@
     {
       devShells.default = pkgs.mkShell {
         packages = with pkgs; [
-          inputs.agenix.packages.${system}.default
+          inputs.agenix.packages.${stdenv.hostPlatform.system}.default
           nil
           nixfmt
         ];