{
  outputs =
    {
      devenv,
      flake-root,
      flake-parts,
      home-manager,
      just-flake,
      nixpkgs,
      nixpkgs-darwin,
      pre-commit-hooks,
      self,
      ...
    }@inputs:
    let
      lib = nixpkgs.lib // home-manager.lib;
      secrets = builtins.fromTOML (builtins.readFile "${self}/secrets/secrets.toml");
      systemsAttributes = lib.genAttrs lib.systems.flakeExposed;

      kansaiPkgs = import "${self}/lib/kansai-pkgs.nix" {
        inherit
          systemsAttributes
          nixpkgs
          nixpkgs-darwin
          self
          inputs
          ;
      };
    in
    flake-parts.lib.mkFlake { inherit inputs; } {
      systems = builtins.attrNames (systemsAttributes (system: system));

      imports = [
        devenv.flakeModule
        flake-root.flakeModule
        just-flake.flakeModule

        (import ./home {
          inherit
            kansaiPkgs
            self
            lib
            inputs
            secrets
            ;

          inherit (self) outputs;
        })

        (import ./hosts {
          inherit
            kansaiPkgs
            self
            lib
            inputs
            secrets
            ;

          inherit (self) outputs;
        })
      ];

      perSystem =
        { system, config, ... }:
        let
          pkgs = (kansaiPkgs { })."${system}";
        in
        {
          imports =
            let
              parts = "${self}/parts";
            in
            [
              (import "${parts}/checks.nix" { inherit pre-commit-hooks system; })
              (if pkgs.stdenv.isDarwin then { } else import "${parts}/devenv.nix" { inherit config lib pkgs; })
            ];

          packages.default = home-manager.defaultPackage."${system}";
          formatter = pkgs.nixfmt-rfc-style;
        };
    };

  inputs = {
    determinate.url = "https://flakehub.com/f/DeterminateSystems/determinate/*";
    flake-root.url = "github:srid/flake-root";
    flake-schemas.url = "https://flakehub.com/f/DeterminateSystems/flake-schemas/=0.1.5.tar.gz";
    just-flake.url = "github:juspay/just-flake";
    mk-shell-bin.url = "github:rrbutani/nix-mk-shell-bin";
    nix-filter.url = "github:numtide/nix-filter";
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    nixpkgs-stable.url = "github:NixOS/nixpkgs/24.05";
    nixpkgs-darwin.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    nur.url = "github:nix-community/NUR";
    systems.url = "github:nix-systems/default";

    aagl = {
      url = "github:ezKEa/aagl-gtk-on-nix";

      inputs = {
        flake-compat.follows = "flake-compat";
        nixpkgs.follows = "nixpkgs";
      };
    };

    apple-fonts = {
      url = "github:Lyndeno/apple-fonts.nix";

      # TODO: sf-pro, sf-compact, sf-mono, sf-arabic, ny
      inputs = {
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
      };
    };

    artginzburg-homebrew-tap = {
      url = "github:artginzburg/homebrew-tap";
      flake = false;
    };

    acsandmann-homebrew-tap = {
      url = "github:acsandmann/homebrew-tap";
      flake = false;
    };

    # brew-src = {
    #   url = "github:Homebrew/brew/4.5.2";
    #   flake = false;
    # };

    oven-sh-homebrew-bun = {
      url = "github:oven-sh/homebrew-bun";
      flake = false;
    };

    cachix = {
      url = "github:cachix/cachix";

      inputs = {
        devenv.follows = "devenv";
        git-hooks.follows = "pre-commit-hooks";
        flake-compat.follows = "flake-compat";
        nixpkgs.follows = "nixpkgs";
      };
    };

    chaotic = {
      url = "github:chaotic-cx/nyx/nyxpkgs-unstable";

      # TODO: fenix?, nixpkgs
      inputs = {
        flake-schemas.follows = "flake-schemas";
        home-manager.follows = "home-manager";
        jovian.follows = "jovian";
      };
    };

    cider = {
      url = "github:Fuwn/cider.nix";

      inputs = {
        flake-compat.follows = "flake-compat";
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
        systems.follows = "systems";
      };
    };

    devenv = {
      url = "github:cachix/devenv";

      # TODO: nix
      inputs = {
        cachix.follows = "cachix";
        flake-compat.follows = "flake-compat";
        nixpkgs.follows = "nixpkgs";
        pre-commit-hooks.follows = "pre-commit-hooks";
      };
    };

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

    fenix = {
      url = "github:nix-community/fenix";

      inputs = {
        nixpkgs.follows = "nixpkgs";
        rust-analyzer-src.follows = "rust-analyzer-src";
      };
    };

    flake-compat = {
      url = "github:edolstra/flake-compat";
      flake = false;
    };

    flake-parts = {
      url = "github:hercules-ci/flake-parts";
      inputs.nixpkgs-lib.follows = "nixpkgs";
    };

    flake-registry = {
      url = "github:NixOS/flake-registry";
      flake = false;
    };

    flake-utils = {
      url = "github:numtide/flake-utils";
      inputs.systems.follows = "systems";
    };

    gigi = {
      url = "github:Fuwn/gigi";

      inputs = {
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
        systems.follows = "systems";
      };
    };

    gitignore = {
      url = "github:hercules-ci/gitignore.nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    gromgit-homebrew-fuse = {
      url = "github:gromgit/homebrew-fuse";
      flake = false;
    };

    hillyu-homebrew-tap = {
      url = "github:hillyu/homebrew-tap";
      flake = false;
    };

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

    homebrew-cask = {
      url = "github:homebrew/homebrew-cask";
      flake = false;
    };

    homebrew-core = {
      url = "github:homebrew/homebrew-core";
      flake = false;
    };

    humanlayer-homebrew-humanlayer = {
      url = "github:humanlayer/homebrew-humanlayer";
      flake = false;
    };

    hyprfocus = {
      url = "github:pyt0xic/hyprfocus";

      inputs = {
        hyprland.follows = "hyprland";
        nix-filter.follows = "nix-filter";
      };
    };

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

      # TODO: aquamarine, hyprcursor, hyprland-protocols, hyprlang, hyprutils,
      #       hyprwayland-scanner, xdph
      inputs = {
        nixpkgs.follows = "nixpkgs";
        pre-commit-hooks.follows = "pre-commit-hooks";
        systems.follows = "systems";
      };
    };

    hyprland-plugins = {
      url = "github:hyprwm/hyprland-plugins";

      inputs = {
        hyprland.follows = "hyprland";
        nixpkgs.follows = "nixpkgs";
        systems.follows = "systems";
      };
    };

    jovian = {
      url = "github:Jovian-Experiments/Jovian-NixOS";

      inputs = {
        nix-github-actions.follows = "nix-github-actions";
        nixpkgs.follows = "nixpkgs";
      };
    };

    koekeishiya-homebrew-tap = {
      url = "github:koekeishiya/homebrew-formulae";
      flake = false;
    };

    nerdsupremacist-homebrew-tap = {
      url = "github:nerdsupremacist/homebrew-tap";
      flake = false;
    };

    nikitabobko-homebrew-tap = {
      url = "github:nikitabobko/homebrew-tap";
      flake = false;
    };

    nix-alien = {
      url = "github:thiagokokada/nix-alien";

      inputs = {
        flake-compat.follows = "flake-compat";
        flake-utils.follows = "flake-utils";
        nix-filter.follows = "nix-filter";
        nix-index-database.follows = "nix-index-database";
        nixpkgs.follows = "nixpkgs";
      };
    };

    nix-darwin = {
      url = "github:LnL7/nix-darwin";
      inputs.nixpkgs.follows = "nixpkgs-darwin";
    };

    nix-gaming = {
      url = "github:fufexan/nix-gaming";

      inputs = {
        flake-parts.follows = "flake-parts";
        nixpkgs.follows = "nixpkgs";
        umu.follows = "umu";
      };
    };

    nix-github-actions = {
      url = "github:zhaofengli/nix-github-actions/matrix-name";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nix-homebrew = {
      url = "github:zhaofengli-wip/nix-homebrew";
      # inputs.brew-src.follows = "brew-src";
    };

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

    nix-microchip = {
      url = "github:Fuwn/nix-microchip";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nix-search = {
      url = "github:diamondburned/nix-search";

      inputs = {
        flake-compat.follows = "flake-compat";
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
      };
    };

    nix-thorium = {
      url = "github:almahdi/nix-thorium";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nix-prettier = {
      url = "github:loophp/nix-prettier";

      inputs = {
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
      };
    };

    nix2container = {
      url = "github:nlewo/nix2container";

      inputs = {
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
      };
    };

    notion-repackaged = {
      url = "github:pikokr/nix-notion-repackaged";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    omnix = {
      url = "github:juspay/omnix";

      # TODO: cachix-push, cargo-doc-live, devour-flake, inspect,
      #       nix-systems-aarch64-darwin, nix-systems-aarch64-linux,
      #       nix-systems-x86_64-darwin, nix-systems-x86_64-linux,
      #       process-compose-flake, rust-flake, treefmt-nix
      inputs = {
        flake-parts.follows = "flake-parts";
        nixpkgs.follows = "nixpkgs";
        systems.follows = "systems";
      };
    };

    pia = {
      url = "github:Fuwn/nixos-pia";

      inputs = {
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
      };
    };

    pre-commit-hooks = {
      url = "github:cachix/git-hooks.nix";

      inputs = {
        flake-compat.follows = "flake-compat";
        gitignore.follows = "gitignore";
        nixpkgs.follows = "nixpkgs";
        nixpkgs-stable.follows = "nixpkgs-stable";
      };
    };

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

    pywal-nix = {
      url = "github:Fuwn/pywal-nix";

      inputs = {
        flake-compat.follows = "flake-compat";
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
        pre-commit-hooks.follows = "pre-commit-hooks";
        systems.follows = "systems";
      };
    };

    rui = {
      url = "github:Fuwn/rui";

      inputs = {
        flake-compat.follows = "flake-compat";
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
        pre-commit-hooks.follows = "pre-commit-hooks";
        systems.follows = "systems";
      };
    };

    rust-analyzer-src = {
      url = "github:rust-lang/rust-analyzer/nightly";
      flake = false;
    };

    sops-nix = {
      url = "github:Mic92/sops-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    spicetify-nix = {
      url = "github:the-argus/spicetify-nix";

      inputs = {
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
      };
    };

    tailray = {
      url = "github:NotAShelf/tailray";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    tsutsumi = {
      url = "github:Fuwn/tsutsumi";

      # TODO: nix-gleam
      inputs = {
        flake-compat.follows = "flake-compat";
        flake-utils.follows = "flake-utils";
        gigi.follows = "gigi";
        gitignore.follows = "gitignore";
        nixpkgs.follows = "nixpkgs";
        pre-commit-hooks.follows = "pre-commit-hooks";
        systems.follows = "systems";
      };
    };

    tuist-homebrew-tap = {
      url = "github:tuist/homebrew-tuist";
      flake = false;
    };

    umu = {
      url = "git+https://github.com/Open-Wine-Components/umu-launcher/?dir=packaging/nix&submodules=1";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
}