{
  description = "Haskell flake";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
  };

  outputs = { self, nixpkgs }: let
    system = "x86_64-linux";
    pkgs = import nixpkgs { inherit system; };
  in {
    devShells.${system}.default = pkgs.mkShell {
      packages = [(
        pkgs.haskellPackages.ghcWithPackages (hp: with hp; [
          extra
          hoogle
        ]))
      ];
    };
  };
}