{
  description = "Super-fast, lightweight and efficient wallpaper daemon for Wayland compositors";
  inputs.nixpkgs.url = "github:NixOS/nixpkgs?ref?nixos-unstable";
  outputs = {
    nixpkgs,
    self,
    ...
  }: let
    systems = ["x86_64-linux" "aarch64-linux"];
    forAllSystems = f:
      builtins.listToAttrs (map (system: {
          name = system;
          value = f system;
        })
        systems);

    pkgsFor = system: nixpkgs.legacyPackages.${system};
  in {
    devShells = forAllSystems (system: let
      pkgs = pkgsFor system;
    in {
      default = pkgs.callPackage ./shell.nix {};
    });

    packages = forAllSystems (system: let
      pkgs = pkgsFor system;
    in {
      chroma = pkgs.callPackage ./nix/package.nix {};
      default = self.packages.${system}.chroma;
    });
  };
}