{
  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
  inputs.homeManager.url = "github:nix-community/home-manager";
  inputs.homeManager.inputs.nixpkgs.follows = "nixpkgs";
  inputs.emacs.url = "github:nix-community/emacs-overlay";
  inputs.sops.url = "github:Mic92/sops-nix";
  inputs.deploy.url = "github:serokell/deploy-rs";
  inputs.home.url = "sourcehut:~afontaine/home";
  inputs.steamFetcher.url = "github:nix-community/steam-fetcher";
  inputs.steamFetcher.inputs.nixpkgs.follows = "nixpkgs";
  inputs.peonPing.url = "github:PeonPing/peon-ping";
  inputs.peonPing.inputs.nixpkgs.follows = "nixpkgs";
  inputs.stylix.url = "github:nix-community/stylix";
  inputs.stylix.inputs.nixpkgs.follows = "nixpkgs";
  inputs.tangled.url = "git+https://tangled.sh/@tangled.sh/core";
  inputs.tangled.inputs.nixpkgs.follows = "nixpkgs";
  inputs.nix-index-database.url = "github:nix-community/nix-index-database";
  inputs.nix-index-database.inputs.nixpkgs.follows = "nixpkgs";

  outputs =
    {
      self,
      nixpkgs,
      homeManager,
      emacs,
      sops,
      deploy,
      home,
      steamFetcher,
      tangled,
      peonPing,
      stylix,
      nix-index-database,
    }:
    let
      systems = [
        "x86_64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
        "aarch64-linux"
      ];
      forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f system);
    in
    {
      overlays = {
        emacs = emacs.overlay;
      };
      nixosModules = {
        nixConfig =
          { pkgs, ... }:
          {
            nix = {
              registry.nixpkgs.to = {
                type = "path";
                path = pkgs.path;
              };
              package = pkgs.lixPackageSets.stable.lix;
              extraOptions = ''
                experimental-features = nix-command flakes
              '';
              settings.trusted-users = [
                "root"
                "@wheel"
              ];
              gc = {
                automatic = true;
                options = "--delete-older-than 10d";
              };
              settings.auto-optimise-store = true;
              nixPath = [ "nixpkgs=${nixpkgs}" ];
            };

            nixpkgs.config.permittedInsecurePackages = [
              "aspnetcore-runtime-6.0.36"
              "aspnetcore-runtime-wrapped-6.0.36"
              "dotnet-sdk-6.0.428"
              "dotnet-sdk-wrapped-6.0.428"
            ];
          };
        emacsOverlay = {
          nixpkgs = {
            overlays = [
              emacs.overlay
            ];
            config = {
              allowUnfree = true;
            };
          };
          home-manager.useGlobalPkgs = true;
        };
        steamOverlay = {
          nixpkgs = {
            overlays = [
              steamFetcher.overlay
            ];
            config = {
              allowUnfree = true;
            };
          };
          home-manager.useGlobalPkgs = true;
        };
        laptops = import ./shared/laptops;
        nixbuild = import ./shared/nixbuild;
      };
      nixosConfigurations = {
        duchess = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          modules = [
            nixpkgs.nixosModules.notDetected
            homeManager.nixosModules.home-manager
            stylix.nixosModules.stylix
            self.nixosModules.emacsOverlay
            self.nixosModules.nixbuild
            self.nixosModules.nixConfig
            sops.nixosModules.sops
            ./duchess
            ./stylix
            ./andrew
            ./cachix.nix
          ];
        };
        slightly-darker-black = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          modules = [
            nixpkgs.nixosModules.notDetected
            homeManager.nixosModules.home-manager
            stylix.nixosModules.stylix
            self.nixosModules.emacsOverlay
            self.nixosModules.laptops
            self.nixosModules.nixbuild
            self.nixosModules.nixConfig
            sops.nixosModules.sops
            ./stylix
            ./slightly-darker-black
            ./andrew
            ./cachix.nix
          ];
        };
        # pam-poovy = nixpkgs.lib.nixosSystem {
        #   system = "x86_64-linux";
        #   modules = [
        #     nixpkgs.nixosModules.notDetected
        #     homeManager.nixosModules.home-manager
        #     self.nixosModules.emacsOverlay
        #     self.nixosModules.laptops
        #     self.nixosModules.nixConfig
        #     sops.nixosModules.sops
        #     ./pam-poovy
        #     ./andrew
        #     ./cachix.nix
        #   ];
        # };
        woodhouse = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          modules = [
            nixpkgs.nixosModules.notDetected
            homeManager.nixosModules.home-manager
            tangled.nixosModules.spindle
            self.nixosModules.emacsOverlay
            self.nixosModules.nixbuild
            self.nixosModules.nixConfig
            self.nixosModules.steamOverlay
            ./woodhouse
            ./andrew/server.nix
            sops.nixosModules.sops
            ./cachix.nix
          ];
        };
        cheryl = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          modules = [
            sops.nixosModules.sops
            homeManager.nixosModules.home-manager
            home.nixosModules.home
            tangled.nixosModules.knot
            self.nixosModules.emacsOverlay
            self.nixosModules.nixConfig
            ./cheryl
            ./andrew/server.nix
            ./cachix.nix
          ];
        };
        cyril-figgis = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          modules = [
            sops.nixosModules.sops
            homeManager.nixosModules.home-manager
            home.nixosModules.home
            self.nixosModules.emacsOverlay
            self.nixosModules.nixConfig
            ./cyril-figgis
            ./andrew/server.nix
            ./cachix.nix
          ];
        };
        ray-gillette = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          modules = [
            sops.nixosModules.sops
            homeManager.nixosModules.home-manager
            home.nixosModules.home
            self.nixosModules.emacsOverlay
            self.nixosModules.nixConfig
            ./ray-gillette
            ./andrew/server.nix
            ./cachix.nix
          ];
        };
      };
      deploy.nodes = {
        cheryl = {
          hostname = "cheryl";
          profiles.system = {
            user = "root";
            path = deploy.lib.x86_64-linux.activate.nixos self.nixosConfigurations.cheryl;
          };
        };
        cyril-figgis = {
          hostname = "cyril-figgis";
          profiles.system = {
            user = "root";
            path = deploy.lib.x86_64-linux.activate.nixos self.nixosConfigurations.cyril-figgis;
          };
        };
        ray-gillette = {
          hostname = "ray-gillette";
          profiles.system = {
            user = "root";
            path = deploy.lib.x86_64-linux.activate.nixos self.nixosConfigurations.ray-gillette;
          };
        };
        duchess = {
          hostname = "duchess";
          sudo = "doas -u";
          profiles.system = {
            user = "root";
            path = deploy.lib.x86_64-linux.activate.nixos self.nixosConfigurations.duchess;
          };
        };
        woodhouse = {
          hostname = "woodhouse";
          profiles.system = {
            user = "root";
            path = deploy.lib.x86_64-linux.activate.nixos self.nixosConfigurations.woodhouse;
          };
        };
      };
      homeConfigurations = {
        andrew = homeManager.lib.homeManagerConfiguration {
          modules = [
            sops.homeManagerModules.sops
            stylix.homeModules.stylix
            peonPing.homeManagerModules.default
            nix-index-database.homeModules.default
            (
              { pkgs, lib, ... }:
              {
                imports = [ ./andrew/home.nix ];
                nixpkgs = {
                  overlays = [
                    emacs.overlay
                    (_final: _prev: {
                      peon-ping = peonPing.packages.x86_64-linux.default;
                    })
                  ];
                  config = {
                    allowUnfree = true;
                  };
                };
                home.homeDirectory = "/home/andrew";
                home.username = "andrew";
              }
            )
          ];
          pkgs = nixpkgs.legacyPackages.x86_64-linux;
        };
      };
      checks = builtins.mapAttrs (system: deployLib: deployLib.deployChecks self.deploy) deploy.lib;
      packages = (
        forAllSystems (
          system:
          let
            pkgs = nixpkgs.legacyPackages.${system};
          in
          {
            # digitalOceanImage =
            #   self.nixosConfigurations.krieger.config.system.build.digitalOceanImage;
            iosevka-mono = pkgs.callPackage ./stylix/fonts/iosevka-mono.nix { };
            iosevka-prop = pkgs.callPackage ./stylix/fonts/iosevka-prop.nix { };
            iosekva-nerd = pkgs.callPackage ./stylix/fonts/iosevka-nerd.nix {
              iosevka = self.packages.${system}.iosevka-mono;
            };
          }
        )
      );
      devShells = (
        forAllSystems (
          system:
          let
            pkgs = nixpkgs.legacyPackages.${system};
            sopsPkgs = sops.packages.${system};
          in
          {
            default = pkgs.mkShell {
              sopsPGPKeyDirs = [
                "./keys/hosts"
                "./keys/users"
              ];

              nativeBuildInputs = [ sopsPkgs.sops-import-keys-hook ];
              buildInputs = [
                sopsPkgs.ssh-to-pgp
                deploy.packages.${system}.default
                pkgs.nix-prefetch
                pkgs.nix-output-monitor
                homeManager.packages.${system}.default
              ];
            };
          }
        )
      );
    };
}