{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs";
    systems.url = "github:nix-systems/default";
    flake-compat.url = "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz";

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

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

  outputs =
    {
      nixpkgs,
      flake-utils,
      ...
    }:
    flake-utils.lib.eachDefaultSystem (system: {
      homeManagerModules.default =
        { config, ... }:
        let
          inherit (pkgs) lib;

          pkgs = import nixpkgs { inherit system; };

          colourScheme = builtins.fromJSON (
            builtins.readFile "${
              pkgs.runCommand "colour-scheme"
                {
                  buildInputs = with pkgs; [
                    imagemagick
                    jq
                    python312Packages.colorthief
                    colorz
                    python312Packages.pillow
                    python312Packages.numpy
                    (pkgs.python3.withPackages (ps: [
                      (ps.buildPythonPackage rec {
                        pname = "haishoku";
                        version = "1.1.8";
                        doCheck = false;

                        src = ps.fetchPypi {
                          inherit pname version;
                          hash = "sha256-5LmhTANYYIGxirzwS0MgFo/qk/9hHoGyvM1dUmn/y9Q=";
                        };
                      })
                      (ps.buildPythonPackage {
                        pname = "fast_colorthief";
                        version = "0.0.5";
                        doCheck = false;
                        dontUseCmakeConfigure = true;

                        nativeBuildInputs = [
                          pkgs.cmake
                          ps.setuptools
                          ps.setuptools_scm
                          ps.scikit-build
                        ];

                        src = pkgs.fetchgit {
                          url = "https://github.com/bedapisl/fast-colorthief";
                          rev = "92eda78157bed309ef9c12e85708ae21241e11d0";
                          hash = "sha256-0S8YI2DlEMx75vuAxcWzTBCcerLvULdh4nY2k3zdsqg=";
                          fetchSubmodules = true;
                        };
                      })
                    ]))
                    (pkgs.buildGoModule {
                      pname = "schemer2";
                      version = "5dc8b0208efce6990c7dd0bf7fe3f044d11c65de";
                      vendorHash = null;

                      src = pkgs.fetchFromGitHub {
                        owner = "Fuwn";
                        repo = "schemer2";
                        rev = "5dc8b0208efce6990c7dd0bf7fe3f044d11c65de";
                        hash = "sha256-/49TRM4B/EVJlj96RQ1RRsGdK2xP95FLkfwngKXL2ZI=";
                      };
                    })
                  ];
                }
                ''
                  mkdir -p $out/wrapper

                  cp ${./wrap.py} $out/wrapper/wrap.py
                  cp -r ${./pywal} $out/wrapper/pywal

                  python3 $out/wrapper/wrap.py ${config.pywal-nix.backend} ${config.pywal-nix.wallpaper} ${
                    if config.pywal-nix.light then "1" else "0"
                  } | \
                    sed "s/'/\"/g" | \
                    jq 'to_entries | map({"colour\(.key)": .value, "color\(.key)": .value}) | add' > $out/colour-scheme
                ''
            }/colour-scheme"
          );
        in
        {
          options.pywal-nix = {
            wallpaper = lib.mkOption {
              type = lib.types.path;
              default = /path/to/wallpaper.png;
            };

            backend = lib.mkOption {
              type = lib.types.enum [
                "colorthief"
                "colorz"
                "fast_colorthief"
                "haishoku"
                "schemer2"
                "wal"
              ];

              default = "wal";
            };

            light = lib.mkOption {
              type = lib.types.bool;
              default = false;
            };

            colourScheme = lib.mkOption {
              type = lib.types.anything;
            };

            colorScheme = lib.mkOption {
              type = lib.types.anything;
            };
          };

          config.pywal-nix.colourScheme = {
            inherit (config.pywal-nix) wallpaper;

            colours = colourScheme;
            colors = colourScheme;

            special = {
              background = colourScheme.colour0;
              foreground = colourScheme.colour15;
              cursor = colourScheme.colour15;
            };
          };

          config.pywal-nix.colorScheme = config.pywal-nix.colourScheme;
        };

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