{
  description = "Evie's machine configurations";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    stylix = {
      url = "github:danth/stylix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = {
    nixpkgs,
    home-manager,
    stylix,
    ...
  }: let
    default = {
      hostName = "Atlas";
      user = "xenia";
      system = "x86_64-linux";
      group = "users";
      shell = "zsh";
      systemModules = [./system/hyprland.nix];
      serviceModules = [];
      homeModules = [./home/hyprland/default.nix];
      stateVersion = "23.05";
    };
    systemConfig = {
      hostName ? default.hostName,
      user ? default.user,
      system ? default.system,
      group ? default.group,
      shell ? default.shell,
      systemModules ? default.systemModules,
      serviceModules ? default.serviceModules,
      homeModules ? default.homeModules,
      stateVersion ? default.stateVersion,
    }: let
      specialArgs = {inherit hostName user group shell;};
    in
      nixpkgs.lib.nixosSystem {
        inherit system specialArgs;
        modules =
          [
            ./hosts/${hostName}/configuration.nix
            ./hosts/${hostName}/hardware-configuration.nix
            home-manager.nixosModules.home-manager
            stylix.nixosModules.stylix
            ({
              config,
              lib,
              pkgs,
              ...
            }: let
              flakeURL = "https://git.xenia.me.uk/xenia/nixos.git?ref=main";
            in {
              boot.loader = {
                systemd-boot.enable = true;
                efi.canTouchEfiVariables = true;
              };
              programs = {
                ${shell}.enable = true;
                command-not-found.enable = false;
                nano = {
                  enable = true;
                  syntaxHighlight = true;
                  nanorc = ''
                    set nowrap
                    set tabstospaces
                    set tabsize 2
                  '';
                };
              };
              nix = {
                enable = true;
                settings = {
                  trusted-users = ["root" user];
                  experimental-features = ["nix-command" "flakes"];
                  auto-optimise-store = true;
                };
                channel.enable = true;
                nixPath = ["nixpkgs=${pkgs.path}"];
                registry = {
                  nixpkgs.flake = nixpkgs;
                  nixos = {
                    from = {
                      type = "indirect";
                      id = "nixos";
                    };
                    to = {
                      type = "git";
                      url = flakeURL;
                    };
                  };
                  pyenv = {
                    from = {
                      type = "indirect";
                      id = "pyenv";
                    };
                    to = {
                      type = "git";
                      url = "https://git.xenia.me.uk/utils/pyenv.git";
                    };
                  };
                  jupyter = {
                    from = {
                      type = "indirect";
                      id = "jupyter";
                    };
                    to = {
                      type = "git";
                      url = "https://git.xenia.me.uk/xenia/nix-jupyter.git";
                    };
                  };
                };
                gc = {
                  automatic = true;
                  options = "--delete-older-than 7d";
                };
                optimise.automatic = true;
                extraOptions = ''
                  keep-outputs = false
                  keep-derivations = false
                  min-free = ${toString (100 * 1024 * 1024)}
                  max-free = ${toString (1024 * 1024 * 1024)}
                '';
              };
              nixpkgs.config.allowUnfree = true;
              system = {
                inherit stateVersion;
                autoUpgrade = {
                  enable = true;
                  flake = "git+${flakeURL}";
                  dates = "02:30";
                };
              };
              networking = {
                inherit hostName;
                firewall.enable = true;
              };
              stylix = {
                autoEnable = false;
                targets = {
                  chromium.enable = true;
                  console.enable = true;
                  fish.enable = true;
                };
                image = ./wallpapers/sweet/Sweet-space.png;
                base16Scheme = ./schemes/modus-vivendi-tinted.yaml;
                polarity = "dark";
                opacity = {
                  applications = 0.85;
                  desktop = 1.0;
                  popups = 0.5;
                  terminal = 0.85;
                };
                fonts = rec {
                  sizes = {
                    applications = 16;
                    desktop = 18;
                    popups = 18;
                    terminal = 16;
                  };
                  serif = monospace;
                  sansSerif = monospace;
                  monospace = {
                    name = "Iosevka Nerd Font";
                    package =
                      pkgs.nerdfonts.override {fonts = ["Iosevka"];};
                  };
                  emoji = {
                    name = "Noto Color Emoji";
                    package = pkgs.noto-fonts-emoji;
                  };
                };
                homeManagerIntegration.followSystem = true;
              };
              fonts = {
                packages = with pkgs; [
                  (nerdfonts.override {fonts = ["NerdFontsSymbolsOnly"];})
                  emacs-all-the-icons-fonts
                  weather-icons
                  noto-fonts
                  noto-fonts-cjk
                  noto-fonts-emoji
                ];
                fontconfig.enable = true;
              };
              users = {
                defaultUserShell = pkgs.${shell};
                users = let
                  authorizedKeys.keys = [
                    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINI1dWlS16Keil0MGPWmMsBzx8F9ylfz+fRwxUr8/tZ/ ion"
                    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDOcgeR3hh23aTiXnyC37xdP8oXfTZbbjgWzkUyxhT9P root@Vanguard"
                    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIANfkqd5lPTsSPU3SRYnAa1UjCYDmDeBTyzq5McmWlm6 xenia@Vanguard"
                    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ/ZSSCN5sqrA+tdoIZr5EUm5DRuBV4dQ7J+QBEtUwUU xenia@Northstar"
                  ];
                in {
                  root.openssh = {inherit authorizedKeys;};
                  ${user} = {
                    inherit group;
                    isNormalUser = true;
                    description = "Evie Litherland-Smith";
                    extraGroups = ["networkmanager" "wheel" "video" "input" "uinput"];
                    initialHashedPassword = "$y$j9T$tHIPQt09Kf3KH2eIRze3g/$2mwSlcq27DTGvHNPJ5EP9/1CfL3bXP0F6oS/Vuffmn3";
                    openssh = {inherit authorizedKeys;};
                  };
                };
              };
              home-manager = {
                extraSpecialArgs = specialArgs;
                useGlobalPkgs = true;
                useUserPackages = true;
                users = {
                  root = {
                    imports = [./home/default.nix];
                    home = {
                      inherit stateVersion;
                      username = "root";
                      homeDirectory = "/root";
                    };
                    programs.home-manager.enable = true;
                  };
                  ${user} = let
                    username = user;
                    homeDirectory = "/home/${user}";
                  in {
                    imports =
                      [./hosts/${hostName}/home.nix ./home/default.nix]
                      ++ homeModules;
                    home = {inherit username homeDirectory stateVersion;};
                    programs.home-manager.enable = true;
                    xdg.userDirs = {
                      enable = true;
                      createDirectories = true;
                      extraConfig = {
                        XDG_PROJECTS_DIR = "${homeDirectory}/Projects";
                      };
                    };
                  };
                };
              };
            })
          ]
          ++ systemModules
          ++ serviceModules;
      };
  in {
    nixosConfigurations = {
      ## Server

      Legion = let
        hostName = "Legion";
        user = "xenia";
        system = "x86_64-linux";
      in
        systemConfig {
          inherit hostName user system;
          systemModules = [./system/default.nix];
          serviceModules = [
            ./services/adguardhome.nix
            ./services/caddy.nix
            ./services/gitea.nix
            ./services/grafana.nix
            ./services/minecraft.nix
            # ./services/ntfy-sh.nix
            ./services/sshd.nix
            ./services/syncthing.nix
          ];
          homeModules = [./home/default.nix];
        };

      ## Personal

      Northstar = let
        hostName = "Northstar";
        user = "xenia";
        system = "x86_64-linux";
      in
        systemConfig {
          inherit hostName user system;
          systemModules = default.systemModules ++ [./system/games.nix];
        };

      Vanguard = let
        hostName = "Vanguard";
        user = "xenia";
        system = "x86_64-linux";
      in
        systemConfig {
          inherit hostName user system;
          systemModules = default.systemModules ++ [./system/games.nix];
        };

      ## Work

      Ronin = let
        hostName = "Ronin";
        user = "elitherl";
        system = "x86_64-linux";
      in
        systemConfig {inherit hostName user system;};

      Scorch = let
        hostName = "Scorch";
        user = "elitherl";
        system = "x86_64-linux";
      in
        systemConfig {inherit hostName user system;};
    };
  };
}