} <| optionalAttrs (pkgs.stdenv.isLinux) {

  } <| optionalAttrs (config.isLinux) {

    |> (if pkgs.stdenv.isDarwin then concatStringsSep ":" else id);

    |> (if config.isDarwin then concatStringsSep ":" else id);

    |> flip removeAttrs (optionals pkgs.stdenv.isDarwin [ "use-cgroups" "cgroups" ]);

    |> flip removeAttrs (optionals config.isDarwin [ "use-cgroups" "cgroups" ]);

{ pkgs, lib, ... }:

{ config, pkgs, lib, ... }:

  ++ lib.optionals pkgs.stdenv.isLinux [

  ++ lib.optionals config.isLinux [

  ++ lib.optionals pkgs.stdenv.isDarwin [

  ++ lib.optionals config.isDarwin [