{
  description = "cdl";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
  };

  outputs =
    { self, nixpkgs }:
    let
      lib = nixpkgs.lib;
      forAllSystems = f: lib.genAttrs lib.systems.flakeExposed (s: f nixpkgs.legacyPackages.${s});
    in
    {
      packages = forAllSystems (pkgs: {
        default = pkgs.callPackage ./nix/package.nix { };
      });
      devShells = forAllSystems (pkgs: {
        default = pkgs.callPackage ./nix/shell.nix { };
      });
      formatter = forAllSystems (pkgs: pkgs.callPackage ./nix/formatter.nix { });
    };
}