{ config, lib, pkgs, ... }:
{
  programs.direnv.enable = true;
  programs.direnv.nix-direnv.enable = true;
  programs.direnv.stdlib = ''
    # From https://github.com/direnv/direnv/wiki/Customizing-cache-location
    : ''${XDG_CACHE_HOME:=$HOME/.cache}
    declare -A direnv_layout_dirs
    direnv_layout_dir() {
        echo "''${direnv_layout_dirs[$PWD]:=$(
          local path="''${PWD//[^a-zA-Z0-9]/-}"
          echo "$XDG_CACHE_HOME/direnv/layouts/''${path:1}"
        )}"
    }
'';
}