{ pkgs ?  import <nixpkgs> {} }:
let
  updateCabal = pkgs.writeShellScriptBin "update-cabal" /* sh */ ''
    cd ${toString ./.}
    echo "# created by cabal2nix " > ${toString ./.}/current-project.nix
    ${pkgs.cabal2nix}/bin/cabal2nix . >> ${toString ./.}/current-project.nix
  '';
in
pkgs.mkShell {
  buildInputs = with pkgs; [
    updateCabal
    cabal2nix
  ];
}