fix: use hostPlatform instead of deprecated system options

flake.nix

@@ -63,11 +63,11 @@
         specialArgs = {inherit inputs stateVersion user dotsDir;};
       in
         nixpkgs.lib.nixosSystem {
-          inherit system specialArgs;
+          inherit specialArgs;
-
           modules =
             [
               {
+                nixpkgs.hostPlatform = system;
                 networking.hostName = hostName;
               }
 
@@ -147,7 +147,7 @@
         modules ? [],
       }:
         home-manager.lib.homeManagerConfiguration {
-          pkgs = import nixpkgs {inherit system;};
+          pkgs = import nixpkgs {hostPlatform = system;};
           inherit modules;
           extraSpecialArgs = {inherit inputs stateVersion user dotsDir;};
         };

home/programs/default.nix

@@ -25,7 +25,7 @@
   ];
 
   home.packages = with pkgs; [
-    inputs.bettersoundcloud.packages.${system}.default
+    inputs.bettersoundcloud.packages.${pkgs.stdenv.hostPlatform.system}.default
 
     gimp
     aseprite

home/programs/spicetify.nix

@@ -8,7 +8,7 @@ in {
   imports = [spicetify-nix.homeManagerModules.default];
 
   programs.spicetify = let
-    spicePkgs = spicetify-nix.legacyPackages.${pkgs.system};
+    spicePkgs = spicetify-nix.legacyPackages.${pkgs.stdenv.hostPlatform.system};
   in {
     enable = true;
 

secrets/default.nix

@@ -14,7 +14,7 @@
     ageFiles;
 in {
   home.packages = with inputs; [
-    agenix.packages."${pkgs.system}".default
+    agenix.packages."${pkgs.stdenv.hostPlatform.system}".default
   ];
 
   age = {