anchor.diff:      my.user.packages = config.my.packages;
       my.env.PATH = [ "$PATH" ];
   
  -    environment.shellAliases = config.my.alias;
       environment.extraInit =
         let exportLines = mapAttrsToList (n: v: "export ${n}=\"${v}\"") config.my.env;
         in ''
  
positive.code:       description = "...";
      };
  
      zsh = {
        rc = mkOption {
          type = types.lines;
  
negative.code:         ${config.my.init}
        '';
  
      my.home.xdg.configFile."zsh/extra.zshrc".text =
        let aliasLines = mapAttrsToList (n: v: "alias ${n}=\"${v}\"") config.my.alias;
        in ''
           ${concatStringsSep "\n" aliasLines}
           ${config.my.zsh.rc}
        '';
      my.home.xdg.configFile."zsh/extra.zshenv".text = config.my.zsh.env;
  
      system.userActivationScripts.mySetup = config.my.setup;
    };
  }
  