refactor: move nixosSystems out of flake

flake.nix

@@ -27,7 +27,6 @@
     ...
   } @ inputs: let
     system = "x86_64-linux";
-    lib = nixpkgs.lib;
     pkgs = import nixpkgs {
       inherit system;
     };
@@ -47,57 +46,6 @@
     };
     deploy = import ./hosts/deploy.nix inputs;
     formatter.${system} = pkgs.alejandra;
-    nixosConfigurations = {
+    nixosConfigurations = import ./hosts/systems.nix inputs;
-      tsuki = lib.nixosSystem {
-        inherit system;
-        modules = [
-          ./hosts/tsuki
-          home-manager.nixosModules.home-manager
-          {
-            home-manager = {
-              useGlobalPkgs = true;
-              useUserPackages = true;
-              extraSpecialArgs = {inherit inputs;};
-              users.notoh = {
-                imports = [
-                  hyprland.homeManagerModules.default
-                  ./hosts/tsuki/home.nix
-                ];
-              };
-            };
-          }
-        ];
-      };
-      hime = lib.nixosSystem {
-        inherit system;
-        modules = [
-          ./hosts/hime
-          home-manager.nixosModules.home-manager
-          {
-            home-manager = {
-              useGlobalPkgs = true;
-              useUserPackages = true;
-              users.oh = {imports = [./hosts/hime/home.nix];};
-            };
-          }
-        ];
-      };
-      sutakku = lib.nixosSystem {
-        inherit system;
-        modules = [
-          ./hosts/sutakku
-          home-manager.nixosModules.home-manager
-          {
-            home-manager = {
-              useGlobalPkgs = true;
-              useUserPackages = true;
-              users.oh = {
-                imports = [./hosts/sutakku/home.nix];
-              };
-            };
-          }
-        ];
-      };
-    };
   };
 }

hosts/systems.nix

@@ -0,0 +1,71 @@
+inputs: let
+  system = "x86_64-linux";
+  inherit (inputs.nixpkgs.lib) nixosSystem;
+in {
+  tsuki = nixosSystem {
+    inherit system;
+    modules = [
+      ./tsuki
+      inputs.home-manager.nixosModules.home-manager
+      {
+        home-manager = {
+          useGlobalPkgs = true;
+          useUserPackages = true;
+          extraSpecialArgs = {inherit inputs;};
+          users.notoh = {
+            imports = [
+              inputs.hyprland.homeManagerModules.default
+              ./tsuki/home.nix
+            ];
+          };
+        };
+      }
+    ];
+  };
+  hime = nixosSystem {
+    inherit system;
+    modules = [
+      ./hime
+      inputs.home-manager.nixosModules.home-manager
+      {
+        home-manager = {
+          useGlobalPkgs = true;
+          useUserPackages = true;
+          users.oh = {imports = [./hime/home.nix];};
+        };
+      }
+    ];
+  };
+  sutakku = nixosSystem {
+    inherit system;
+    modules = [
+      ./sutakku
+      inputs.home-manager.nixosModules.home-manager
+      {
+        home-manager = {
+          useGlobalPkgs = true;
+          useUserPackages = true;
+          users.oh = {
+            imports = [./sutakku/home.nix];
+          };
+        };
+      }
+    ];
+  };
+  sakura = nixosSystem {
+    inherit system;
+    modules = [
+      ./sakura
+      inputs.home-manager.nixosModules.home-manager
+      {
+        home-manager = {
+          useGlobalPkgs = true;
+          useUserPackages = true;
+          users.notoh = {
+            imports = [./sakura/home.nix];
+          };
+        };
+      }
+    ];
+  };
+}