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flake.nix

@@ -2,53 +2,121 @@
   description = "NixOS configuration";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nixpkgs-stable.url = "github:NixOS/nixpkgs/nixos-25.05";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
 
-    disko = {
+    disko-stable = {
       url = "github:nix-community/disko";
-      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.nixpkgs.follows = "nixpkgs-stable";
+    };
+    disko-unstable = {
+      url = "github:nix-community/disko";
+      inputs.nixpkgs.follows = "nixpkgs-unstable";
     };
 
-    home-manager = {
+    home-manager-unstable = {
       url = "github:nix-community/home-manager";
-      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.nixpkgs.follows = "nixpkgs-unstable";
     };
 
-    "lolcat++" = {
+    mailserver = {
+      url = "gitlab:simple-nixos-mailserver/nixos-mailserver?ref=nixos-25.05";
+      inputs.nixpkgs.follows = "nixpkgs-stable";
+    };
+
+    "lolcat++-stable" = {
       url = "github:lolcatpp/lolcatpp";
-      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.nixpkgs.follows = "nixpkgs-stable";
+    };
+    "lolcat++-unstable" = {
+      url = "github:lolcatpp/lolcatpp";
+      inputs.nixpkgs.follows = "nixpkgs-unstable";
     };
 
     dotfiles = {
       url = "path:/home/love/dotfiles";
-      inputs.nixpkgs.follows = "nixpkgs";
-      inputs.home-manager.follows = "home-manager";
+      inputs.nixpkgs.follows = "nixpkgs-unstable";
+      inputs.home-manager.follows = "home-manager-unstable";
     };
   };
 
   outputs =
     inputs@{
-      nixpkgs,
-      disko,
-      home-manager,
+      nixpkgs-stable,
+      nixpkgs-unstable,
+      disko-stable,
+      disko-unstable,
+      home-manager-unstable,
       dotfiles,
       ...
     }:
+    let
+      mkHost = {
+        hostPath,
+        nixpkgs,
+        disko,
+        lolcat,
+      }:
+        nixpkgs.lib.nixosSystem {
+          system = "x86_64-linux";
+          specialArgs = {
+            inputs = inputs // { "lolcat++" = lolcat; };
+          };
+          modules = [
+            disko.nixosModules.disko
+            hostPath
+          ];
+        };
+      mkDesktopHost = {
+        hostPath,
+        nixpkgs,
+        disko,
+        lolcat,
+      }:
+        nixpkgs.lib.nixosSystem {
+          system = "x86_64-linux";
+          specialArgs = {
+            inputs = inputs // { "lolcat++" = lolcat; };
+          };
+          modules = [
+            disko.nixosModules.disko
+            home-manager-unstable.nixosModules.home-manager
+            {
+              home-manager.useGlobalPkgs = true;
+              home-manager.useUserPackages = true;
+              home-manager.backupFileExtension = "hm-backup";
+              home-manager.users.love = import "${dotfiles}/home.nix";
+            }
+            hostPath
+          ];
+        };
+    in
     {
-      nixosConfigurations.kronos = nixpkgs.lib.nixosSystem {
-        system = "x86_64-linux";
-        specialArgs = { inherit inputs; };
-        modules = [
-          disko.nixosModules.disko
-          home-manager.nixosModules.home-manager
-          {
-            home-manager.useGlobalPkgs = true;
-            home-manager.useUserPackages = true;
-            home-manager.backupFileExtension = "hm-backup";
-            home-manager.users.love = import "${dotfiles}/home.nix";
-          }
-          ./hosts/kronos
-        ];
+      nixosConfigurations = {
+        Kronos = mkDesktopHost {
+          hostPath = ./hosts/kronos;
+          nixpkgs = nixpkgs-unstable;
+          disko = disko-unstable;
+          lolcat = inputs."lolcat++-unstable";
+        };
+        kronos = mkDesktopHost {
+          hostPath = ./hosts/kronos;
+          nixpkgs = nixpkgs-unstable;
+          disko = disko-unstable;
+          lolcat = inputs."lolcat++-unstable";
+        };
+        Hermes = mkHost {
+          hostPath = ./hosts/hermes;
+          nixpkgs = nixpkgs-stable;
+          disko = disko-stable;
+          lolcat = inputs."lolcat++-stable";
+        };
+        hermes = mkHost {
+          hostPath = ./hosts/hermes;
+          nixpkgs = nixpkgs-stable;
+          disko = disko-stable;
+          lolcat = inputs."lolcat++-stable";
+        };
       };
     };
 }