{
  description = "NixOS configuration for all hosts";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
    nur = {
      url = "github:nix-community/NUR";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nur-unstable = {
      url = "github:nix-community/NUR";
      inputs.nixpkgs.follows = "nixpkgs-unstable";
    };
    home-manager = {
      url = "github:nix-community/home-manager/release-25.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { self, nixpkgs, nixpkgs-unstable, nur, nur-unstable, home-manager, ... }: 
    let
      system = "x86_64-linux";
      pkgs = import nixpkgs {
        inherit system;
        config.allowUnfree = true;
        flake.setFlakeRegistry = true;
        overlays = [ nur.overlays.default ];
      };
      pkgs-unstable = import nixpkgs-unstable {
        inherit system;
        config.allowUnfree = true;
        flake.setFlakeRegistry = true;
        overlays = [ nur-unstable.overlays.default ];
      };
      sharedSpecialArgs = {
        inherit pkgs-unstable;
      };
      sharedModules = [
        ./hosts/common/base.nix
        home-manager.nixosModules.home-manager
        ({ config, ...}: {
          home-manager.useGlobalPkgs = true;
          home-manager.useUserPackages = true;
          home-manager.extraSpecialArgs = {
            inherit (config.networking) hostName;
            inherit pkgs pkgs-unstable;    
          }; # end extraSpecialArgs
          home-manager.backupFileExtension = "backup";
        }) # end home manager
      ]; # end sharedModules
    in
    {
      nixosConfigurations = {
        electra = nixpkgs.lib.nixosSystem {
          inherit system;
          inherit pkgs;
          specialArgs = sharedSpecialArgs // {};
          modules = sharedModules ++ [
            ./hosts/common/workstation.nix
            ./hosts/electra/configuration.nix
            ./hosts/common/wm/sway.nix
            home-manager.nixosModules.home-manager
            ({ config, ...}: {
              home-manager.users.alisceon.imports = [
                ./home/alisceon/base.nix
                ./home/alisceon/workstation.nix
                ./home/wm/sway.nix
              ];
            }) # end home-manager
          ]; # end modules
        }; # end electra
        tower = nixpkgs.lib.nixosSystem {
          inherit system;
          inherit pkgs;
          specialArgs = sharedSpecialArgs // {};
          modules = sharedModules ++ [
            ./hosts/common/workstation.nix
            ./hosts/tower/configuration.nix
            ./hosts/common/wm/sway.nix
            home-manager.nixosModules.home-manager
            ({ config, ...}: {
              home-manager.users.alisceon.imports = [
                ./home/alisceon/base.nix
                ./home/alisceon/workstation.nix
                ./home/wm/sway.nix
              ];
            }) # end home-manager
          ]; # end modules
        }; # end tower
        tesla-nixos = nixpkgs.lib.nixosSystem {
          inherit system;
          inherit pkgs;
          specialArgs = sharedSpecialArgs // {};
          modules = sharedModules ++ [
            ./hosts/common/server.nix
            ./hosts/tesla-nixos/configuration.nix
            home-manager.nixosModules.home-manager
            ({ config, ...}: {
              home-manager.users.alisceon.imports = [
                ./home/alisceon/base.nix
                ./home/alisceon/server.nix
              ];
            }) # end home-manager
          ]; # end modules
        }; # end tesla-nixos 
        blogbox = nixpkgs.lib.nixosSystem {
          inherit system;
          inherit pkgs;
          specialArgs = sharedSpecialArgs // {};
          modules = sharedModules ++ [
            ./hosts/common/server.nix
            ./hosts/blogbox/configuration.nix
            home-manager.nixosModules.home-manager
            ({ config, ...}: {
              home-manager.users.alisceon.imports = [
                ./home/alisceon/base.nix
                ./home/alisceon/server.nix
              ];
            }) # end home-manager
          ]; # end modules
        }; # end tesla-nixos 
      }; # end nixos conf
    }; # end "in"
} # end file