remove deprecated system passing

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

Wherever possible, it's best to reference the hostPlatform of the
nixpkgs instance directly via `config`. This is only possible in NixOS
systems though, for standalon home-manager configs we need to get that
value through `pkgs.stdenv`.

common/guest.nix

@@ -1,7 +1,6 @@
 {
   config,
   lib,
-  system,
   ...
 }:
 let
@@ -56,7 +55,7 @@ in
         # Optionally use extraSpecialArgs
         # to pass through arguments to home.nix
         extraSpecialArgs = {
-          inherit inputs system;
+          inherit inputs;
         };
 
       };

flake.nix

@@ -80,14 +80,11 @@
         system: extraModules:
         nixpkgs.lib.nixosSystem rec {
           modules = (defaultModules system) ++ extraModules;
-          inherit system;
-          specialArgs = {
-            inherit system;
-          };
         };
       mkHomeManager =
         confName: user: system: # unfortunately, home-manager configs are still system-specific
         home-manager.lib.homeManagerConfiguration {
+          # XXX: when can we move to hostPlatform?
           pkgs = import (mkNixpkgs-patched system) { inherit system; };
           modules = [
             {
@@ -102,7 +99,7 @@
           # Optionally use extraSpecialArgs
           # to pass through arguments to home.nix
           extraSpecialArgs = {
-            inherit inputs system;
+            inherit inputs;
           };
         };
       treefmtConf =
@@ -200,7 +197,7 @@
               exit 0
             fi
             ${
-              inputs.home-manager.packages.${pkgs.system}.home-manager
+              inputs.home-manager.packages.${system}.home-manager
             }/bin/home-manager --flake "${self}#$profile" "$@"
           ''}/bin/hm";
         };

home/common.nix

@@ -2,7 +2,6 @@
   pkgs,
   inputs,
   config,
-  system,
   lib,
   ...
 }:

home/desktop.nix

@@ -2,7 +2,6 @@
   pkgs,
   inputs,
   config,
-  system,
   lib,
   ...
 }:

home/modules/captive-browser.nix

@@ -3,7 +3,6 @@
   lib,
   inputs,
   config,
-  system,
   ...
 }:
 

home/modules/fonts.nix

@@ -2,7 +2,6 @@
   pkgs,
   inputs,
   config,
-  system,
   ...
 }:
 {
@@ -15,7 +14,7 @@
     twemoji-color-font
     open-sans
     (iosevka-bin.override { variant = "CurlySlab"; })
-    inputs.nur.legacyPackages.${system}.repos.schmittlauch.vollkorn
+    inputs.nur.legacyPackages.${pkgs.stdenv.hostPlatform.system}.repos.schmittlauch.vollkorn
     # TODO: humor-sans
 
     # fcio corporate design, TODO module

home/modules/latex.nix

@@ -2,7 +2,6 @@
   pkgs,
   inputs,
   config,
-  system,
   lib,
   ...
 }:

home/modules/llm.nix

@@ -3,7 +3,6 @@
   lib,
   inputs,
   config,
-  system,
   ...
 }:
 let

home/modules/packages.nix

@@ -2,15 +2,14 @@
   pkgs,
   inputs,
   config,
-  system,
   ...
 }:
 
 with pkgs;
 let
   cfg = config.schmittlauch.packages;
-  unstable = inputs.nixos-unstable.legacyPackages.${system};
+  unstable = inputs.nixos-unstable.legacyPackages.${stdenv.hostPlatform.system};
-  nur = inputs.nur.legacyPackages.${system};
+  nur = inputs.nur.legacyPackages.${stdenv.hostPlatform.system};
 
   graphicsApps = [
     inkscape

home/modules/vscodium.nix

@@ -3,7 +3,6 @@
   lib,
   inputs,
   config,
-  system,
   ...
 }:
 {

home/workmac.nix

@@ -2,14 +2,13 @@
   pkgs,
   inputs,
   config,
-  system,
   lib,
   ...
 }:
 
 with pkgs;
 let
-  unstable = inputs.nixos-unstable.legacyPackages.${system};
+  unstable = inputs.nixos-unstable.legacyPackages.${pkgs.stdenv.hostPlatform.system};
 in
 {
   imports = [ ./modules/llm.nix ];

hosts/framenix/default.nix

@@ -2,11 +2,11 @@
   config,
   lib,
   pkgs,
-  system,
   ...
 }:
 let
-  unstable = config.inputInjection.flake-inputs.nixos-unstable.legacyPackages.${system};
+  unstable =
+    config.inputInjection.flake-inputs.nixos-unstable.legacyPackages.${config.nixpkgs.hostPlatform};
 in
 {
   imports = [

hosts/thinknix/hardware-configuration.nix

@@ -9,6 +9,8 @@
 {
   imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
 
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+
   boot.initrd.availableKernelModules = [
     "xhci_pci"
     "ehci_pci"