{
  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";
    };
    hyprland = {
      url = "github:hyprwm/Hyprland";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    anyrun = {
      url = "github:Kirottu/anyrun";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    wallpapers.url = "git+https://git.xenia.me.uk/xenia/wallpapers.git";
    catppuccin-alacritty = {
      url = "github:catppuccin/alacritty";
      flake = false;
    };
    catppuccin-bat = {
      url = "github:catppuccin/bat";
      flake = false;
    };
    catppuccin-fish = {
      url = "github:catppuccin/fish";
      flake = false;
    };
    catppuccin-gitui = {
      url = "github:catppuccin/gitui";
      flake = false;
    };
    catppuccin-hyprland = {
      url = "github:catppuccin/hyprland";
      flake = false;
    };
    catppuccin-zathura = {
      url = "github:catppuccin/zathura";
      flake = false;
    };
    catppuccin-zsh = {
      url = "github:catppuccin/zsh-syntax-highlighting";
      flake = false;
    };
  };

  outputs = { self, nixpkgs, ... }@inputs:
    let
      flakeURL = "git+https://git.xenia.me.uk/xenia/nixos.git?ref=main";
      catppuccin-themes = with inputs; {
        alacritty = "${catppuccin-alacritty}/catppuccin-mocha.yml";
        bat = "${catppuccin-bat}/Catppuccin-mocha.tmTheme";
        fish = "${catppuccin-fish}/themes/Catppuccin Mocha.theme";
        gitui = "${catppuccin-gitui}/theme/mocha.ron";
        hyprland = "${catppuccin-hyprland}/themes/mocha.conf";
        zathura = "${catppuccin-zathura}/src/catppuccin-mocha";
        zsh =
          "${catppuccin-zsh}/themes/catppuccin_mocha-zsh-syntax-highlighting.zsh";
      };
      default = {
        hostName = "Atlas";
        user = "xenia";
        system = "x86_64-linux";
        group = "users";
        shell = "zsh";
        systemModules = [ ./system/hyprland.nix ];
        serviceModules =
          [ ./services/sshd/default.nix ./services/syncthing/default.nix ];
        homeModules = [
          ./home/accounts/service.nix
          ./home/pass/service.nix
          ./home/git/default.nix
          ./home/ssh/default.nix
          ./home/tui/default.nix
          ./home/tmux/default.nix
          ./home/hyprland/default.nix
          ./home/alacritty/default.nix
          ./home/firefox/default.nix
          ./home/zathura/default.nix
          ./home/emacs/server.nix
          ./home/neovim/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
          pkgs = import nixpkgs {
            inherit system;
            config.allowUnfree = true;
            overlays = [
              (final: prev: {
                waybar = prev.waybar.overrideAttrs (oldAttrs: {
                  mesonFlags = oldAttrs.mesonFlags ++ [ "-Dexperimental=true" ];
                });
              })
            ];
          };
          commonModule = {
            nix = {
              settings = {
                experimental-features = [ "nix-command" "flakes" ];
                auto-optimise-store = true;
              };
              gc = {
                automatic = true;
                dates = "weekly";
                options = "--delete-older-than 30d";
              };
              extraOptions = ''
                keep-outputs = true
                keep-derivations = true
                min-free = ${toString (100 * 1024 * 1024)}
                max-free = ${toString (1024 * 1024 * 1024)}
              '';
            };
            networking = {
              inherit hostName;
              networkmanager.enable = true;
            };
            environment = {
              systemPackages = with pkgs; [ git neofetch ];
              localBinInPath = true;
              shellAliases.nou =
                ''sudo nixos-rebuild switch --flake "${flakeURL}"'';
            };
            services = {
              power-profiles-daemon.enable = true;
              passSecretService.enable = true;
            };
            virtualisation.podman.enable = true;
            time.timeZone = "Europe/London";
            i18n = let locale = "en_GB.UTF-8";
            in {
              # Select internationalisation properties.
              defaultLocale = locale;
              extraLocaleSettings = {
                LC_ADDRESS = locale;
                LC_IDENTIFICATION = locale;
                LC_MEASUREMENT = locale;
                LC_MONETARY = locale;
                LC_NAME = locale;
                LC_NUMERIC = locale;
                LC_PAPER = locale;
                LC_TELEPHONE = locale;
                LC_TIME = locale;
              };
            };
            programs.${shell}.enable = true;
            system = {
              inherit stateVersion;
              autoUpgrade.flake = flakeURL;
            };
            users.users.${user} = {
              inherit group;
              isNormalUser = true;
              description = "Evie Litherland-Smith";
              extraGroups = [ "networkmanager" "wheel" "video" ];
              shell = pkgs.${shell};
              openssh.authorizedKeys.keys = [
                "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIANfkqd5lPTsSPU3SRYnAa1UjCYDmDeBTyzq5McmWlm6 xenia@Vanguard"
                "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINI1dWlS16Keil0MGPWmMsBzx8F9ylfz+fRwxUr8/tZ/ ion"
                "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAII1tJFdbiyJApuVZFvo9E9kjlBwvXZeySqVuS2qGdxha tux@monarch"
                "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDI44C35I2x9tqzeZDmIpbzmGJWXfATn/Wp5KzVRdlCi root@debian"
                "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKMVEXJTqWkrpmvinPJGsSvome9bCd0CM4iu13aVG6UZ elitherl@Ronin"
                "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ/ZSSCN5sqrA+tdoIZr5EUm5DRuBV4dQ7J+QBEtUwUU xenia@Northstar"
              ];
            };
            home-manager = {
              useGlobalPkgs = true;
              useUserPackages = true;
              extraSpecialArgs = {
                inherit hostName user shell inputs catppuccin-themes;
                hyprland = inputs.hyprland;
                anyrun = inputs.anyrun;
                wallpapers = inputs.wallpapers;
              };
              users.${user} = let
                username = user;
                homeDirectory = "/home/${user}";
              in {
                imports =
                  [ ./home/shell/${shell}.nix ./hosts/${hostName}/home.nix ]
                  ++ homeModules;
                home = { inherit username homeDirectory stateVersion; };
                programs.home-manager.enable = true;
                xdg.userDirs = {
                  enable = true;
                  createDirectories = true;
                  extraConfig = {
                    XDG_PROJECTS_DIR = "${homeDirectory}/Projects";
                  };
                };
              };
            };
          };
        in nixpkgs.lib.nixosSystem {
          inherit pkgs;
          specialArgs = { inherit hostName user group shell inputs; };
          modules = [
            ./hosts/${hostName}/configuration.nix
            ./hosts/${hostName}/hardware-configuration.nix
            inputs.home-manager.nixosModules.home-manager
            commonModule
          ] ++ systemModules ++ serviceModules;
        };
      homeConfig = { hostName ? default.hostName, user ? default.user
        , system ? default.system, shell ? default.shell
        , homeModules ? default.homeModules, stateVersion ? default.stateVersion
        }:
        inputs.home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit hostName user shell inputs catppuccin-themes;
            hyprland = inputs.hyprland;
            anyrun = inputs.anyrun;
            wallpapers = inputs.wallpapers;
          };
          modules = [
            ./home/shell/${shell}.nix
            ./hosts/${hostName}/home.nix
            {
              home = {
                inherit stateVersion;
                username = user;
                homeDirectory = nixpkgs.lib.mkDefault "/home/${user}";
              };
            }
          ] ++ homeModules;
        };
    in {
      nixosConfigurations = {

        Legion = let
          hostName = "Legion";
          user = "xenia";
          system = "x86_64-linux";
        in systemConfig {
          inherit hostName user system;
          systemModules = [ ];
          serviceModules = [
            ./services/adguardhome/default.nix
            ./services/gitea/default.nix
            ./services/nextcloud/default.nix
            ./services/sshd/default.nix
            ./services/syncthing/default.nix
            ./services/terraria/windy_limbo_of_melancholy.nix
            ./services/traefik/adguardhome.nix
            ./services/traefik/gitea.nix
            ./services/traefik/nextcloud.nix
            ./services/traefik/qbittorrent.nix
          ];
          homeModules = [
            ./home/git/default.nix
            ./home/ssh/default.nix
            ./home/tui/default.nix
          ];
        };

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

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

        Vanguard = let
          hostName = "Vanguard";
          user = "xenia";
          system = "x86_64-linux";
        in systemConfig {
          inherit hostName user system;
          systemModules = [ ./system/gamepass.nix ];
          serviceModules = [ ./services/sshd/default.nix ];
          homeModules = [
            ./home/git/default.nix
            ./home/ssh/default.nix
            ./home/tui/default.nix
          ];
        };

      };
      homeConfigurations = {
        "tux@Monarch" = let
          hostName = "Monarch";
          user = "tux";
          system = "aarch64-darwin";
          shell = "zsh";
        in homeConfig {
          inherit hostName user system shell;
          homeModules = [
            ./home/accounts/default.nix
            ./home/pass/default.nix
            ./home/git/default.nix
            ./home/ssh/default.nix
            ./home/tui/default.nix
            ./home/tmux/default.nix
            ./home/alacritty/default.nix
            ./home/emacs/default.nix
          ];
        };
      };
    };
}