{
  username ? throw "username argument is required",
}:
{ config, ... }:
let
  userConfig = config.users.users.${username};
  hmConfig = config.home-manager.users.${username};
in
{
  environment.sessionVariables.ZDOTDIR = "$HOME/.config/zsh";

  home-manager.users.${username} = {
    programs.zsh = {
      enable = true;
      dotDir = "${hmConfig.xdg.relativeConfigHome}/zsh";
      autocd = true;
      history = {
        path = "${hmConfig.xdg.dataHome}/zsh/history";
        expireDuplicatesFirst = true;
      };
      historySubstringSearch.enable = true;
      autosuggestion.enable = true;
      syntaxHighlighting.enable = true;
    };

    home = {
      file.".zshenv".enable = false;
      persistence."/persist${userConfig.home}".directories = [ "${hmConfig.xdg.relativeDataHome}/zsh" ];
    };
  };
}