{
  description = "NixOS + Home Manager config";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixpkgs-unstable";

    home-manager = {
      url = "github:nix-community/home-manager/release-25.05";
      inputs.nixpkgs.follows = "nixpkgs";
    };

  };

  outputs = inputs@{ self, nixpkgs, home-manager, ... }:
    let
      system = "x86_64-linux";
      lib = nixpkgs.lib;
      pkgs-unstable = import inputs.nixpkgs-unstable {
        system = system;
        config.allowUnfree = true;
      };
    in
    {
      nixosConfigurations = {
        segfault-machine = lib.nixosSystem {
          inherit system; # inherited it from 'let' block

          specialArgs = { inherit pkgs-unstable; };

          modules = [
            ./hosts/segfault-machine/configuration.nix

            home-manager.nixosModules.home-manager {
              home-manager.backupFileExtension = "backup";
              home-manager.useGlobalPkgs = true;
              home-manager.useUserPackages = true;



              home-manager.users.lukas.imports = [
                ./home/lukas/laptop/default.nix
              ];

              home-manager.extraSpecialArgs = { inherit inputs; };

            }
          ];
        };

        segfault-tower = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          specialArgs = { inherit pkgs-unstable; };
          modules = [
            ./hosts/segfault-tower/configuration.nix


            home-manager.nixosModules.home-manager {
              home-manager.backupFileExtension = "backup";
              home-manager.useGlobalPkgs = true;
              home-manager.useUserPackages = true;

              home-manager.users.lukas.imports = [
                ./home/lukas/tower/default.nix
              ];

              home-manager.extraSpecialArgs = { inherit inputs; };
            }
          ];
        };

      };
  };
}