{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
    master.url = "github:nixos/nixpkgs/master";
    stable.url = "github:nixos/nixpkgs/nixos-22.11";
    unstable.url = "github:nixos/nixpkgs/nixos-unstable";
    home-manager.url = "github:nix-community/home-manager";
    spicetify-nix.url = "github:the-argus/spicetify-nix";
    nur.url = "github:nix-community/NUR";
    nixpkgs-f2k.url = "github:moni-dz/nixpkgs-f2k";
    nix-gaming.url = "github:fufexan/nix-gaming";
    systems.url = "github:nix-systems/default-linux";
    nix-thorium.url = "github:almahdi/nix-thorium";
    nix-alien.url = "github:thiagokokada/nix-alien";
    pre-commit-hooks.url = "github:cachix/git-hooks.nix";

    nix-index-database = {
      url = "github:nix-community/nix-index-database";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    pia = {
      url = "git+https://git.sr.ht/~rprospero/nixos-pia?ref=development";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    hyprland = {
      type = "git";
      url = "https://github.com/hyprwm/Hyprland";
      submodules = true;
    };

    hyprland-plugins = {
      url = "github:hyprwm/hyprland-plugins";
      inputs.hyprland.follows = "hyprland";
    };

    Hyprspace = {
      url = "github:KZDKM/Hyprspace";
      inputs.hyprland.follows = "hyprland";
    };
  };

  outputs =
    {
      self,
      nixpkgs,
      home-manager,
      systems,
      nix-index-database,
      pia,
      ...
    }@inputs:
    let
      inherit (self) outputs;
      lib = nixpkgs.lib // home-manager.lib;
      forAllSystems = nixpkgs.lib.genAttrs (import systems);
      nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; });
      secrets = builtins.fromJSON (builtins.readFile "${self}/secrets/secrets.json");
      system = builtins.currentSystem;
    in
    {
      inherit lib;

      packages = forAllSystems (system: {
        default = home-manager.defaultPackage."${system}";
      });

      formatter = forAllSystems (system: {
        default = nixpkgs.legacyPackages."${system}".nixfmt-rfc-style;
      });

      checks = forAllSystems (system: {
        pre-commit-check = inputs.pre-commit-hooks.lib.${system}.run {
          src = ./.;

          hooks = {
            deadnix.enable = true;
            flake-checker.enable = true;
            nixfmt-rfc-style.enable = true;
            statix.enable = true;
          };
        };
      });

      devShells = forAllSystems (system: {
        default = nixpkgs.legacyPackages.${system}.mkShell {
          inherit (self.checks.${system}.pre-commit-check) shellHook;
          buildInputs = self.checks.${system}.pre-commit-check.enabledPackages;
        };
      });

      nixosConfigurations.kansai = lib.nixosSystem {
        specialArgs = {
          inherit inputs outputs secrets;
        };

        modules = [
          home-manager.nixosModule
          pia.nixosModule
          nix-index-database.nixosModules.nix-index
          ./hosts/kansai
        ];
      };

      homeConfigurations.ebisu = home-manager.lib.homeManagerConfiguration {
        pkgs = nixpkgsFor."${system}";
        modules = [ ./home/ebisu ];

        extraSpecialArgs = {
          inherit
            inputs
            outputs
            self
            system
            secrets
            ;
        };
      };
    };
}