{ pkgs, ... }:
pkgs.mkShell {
  name = "shell";
  src = null;
  #preferLocalBuild = true;
  #allowSubstitutes = false;
  buildInputs = [
    (pkgs.nixos []).nixos-install
  ];
  #enableParallelBuilding = true;
  shellHook = ''
    echo >&2 "nix: running shellHook"

    PATH=$NIX_SHELL_PATH:$PATH
    export NIX_PATH="${pkgs.lib.concatStringsSep ":" [
      "nixpkgs=${toString pkgs.path}"
      #"nixpkgs-overlays=$PWD/nixpkgs/overlays.nix"
    ]}"
  '';
}