diff --git a/flake.nix b/flake.nix
index bb17a090..26c097d9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -358,7 +358,10 @@
           ];
 
           config = lib.mkMerge [
-            { networking.hostName = lib.mkForce metadata.hostname or host; }
+            {
+              networking.hostName = lib.mkForce metadata.hostname or host;
+              nixpkgs.hostPlatform = metadata._system;
+            }
 
             (lib.mkIf (metadata ? domain)
               { networking.domain = lib.mkForce metadata.domain; })
@@ -377,7 +380,6 @@
           (host: metadata:
             mkHost {
               extraModules = [ (hostSpecificModule host metadata) ];
-              system = metadata._system;
               nixpkgs-channel = metadata.nixpkgs-channel or "nixpkgs";
             })
           (listImagesWithSystems images);
@@ -453,7 +455,7 @@
                 format = metadata.format or "iso";
               in
               lib'.nameValuePair name (mkImage {
-                inherit format system pkgs;
+                inherit format pkgs;
                 extraModules = [ (hostSpecificModule host metadata) ];
               }))
             images');
diff --git a/lib/images.nix b/lib/images.nix
index 8dba7e7f..ee350135 100644
--- a/lib/images.nix
+++ b/lib/images.nix
@@ -9,11 +9,10 @@ let
 in
 {
   # A wrapper around the NixOS configuration function.
-  mkHost = { system, extraModules ? [ ], nixpkgs-channel ? "nixpkgs" }:
+  mkHost = { extraModules ? [ ], nixpkgs-channel ? "nixpkgs" }:
     let lib' = inputs.${nixpkgs-channel}.lib.extend extendLib; in
     (lib'.makeOverridable lib'.nixosSystem) {
-      # The system of the NixOS system.
-      modules = extraModules ++ [{ nixpkgs.hostPlatform = system; }];
+      modules = extraModules;
     };
 
   # A wrapper around the home-manager configuration function.
@@ -25,9 +24,9 @@ in
     };
 
   # A wrapper around the nixos-generators `nixosGenerate` function.
-  mkImage = { system, pkgs ? null, extraModules ? [ ], format ? "iso" }:
+  mkImage = { pkgs ? null, extraModules ? [ ], format ? "iso" }:
     inputs.nixos-generators.nixosGenerate {
-      inherit pkgs system format;
+      inherit pkgs format;
       lib = pkgs.lib.extend extendLib;
       modules = extraModules;
     };