diff --git a/flake.nix b/flake.nix
index 4173060..2eca1e2 100755
--- a/flake.nix
+++ b/flake.nix
@@ -86,27 +86,20 @@
 
     nixosConfigurations = {
       demeter = nixpkgs.lib.nixosSystem {
-        system = "x86_64-linux";
-        specialArgs = {
-          inherit inputs;
-        };
+        specialArgs = {inherit inputs;};
         modules = [
           ./hosts/demeter
         ];
       };
 
       callisto = nixpkgs.lib.nixosSystem {
-        specialArgs = {
-          inherit inputs;
-        };
+        specialArgs = {inherit inputs;};
         modules = [
           ./hosts/callisto
         ];
       };
       adrastea = nixpkgs.lib.nixosSystem {
-        specialArgs = {
-          inherit inputs;
-        };
+        specialArgs = {inherit inputs;};
         modules = [
           ./hosts/adrastea
         ];
diff --git a/hosts/demeter/default.nix b/hosts/demeter/default.nix
index 69f2b56..c90be99 100644
--- a/hosts/demeter/default.nix
+++ b/hosts/demeter/default.nix
@@ -23,10 +23,7 @@
       home-manager.useGlobalPkgs = true;
       home-manager.useUserPackages = true;
       home-manager.backupFileExtension = "backup";
-      home-manager.extraSpecialArgs = {
-        inherit inputs;
-        inherit system;
-      };
+      home-manager.extraSpecialArgs = {inherit inputs;};
       home-manager.users.youwen = {
         imports = [
           ../../users/youwen/linux/desktop