anchor.diff:  
   assert alsaSupport   -> alsaLib       != null;
   assert githubSupport -> curl          != null;
  -assert mpdSupport    -> mpd_clientlib != null;
  +assert mpdSupport    -> libmpdclient != null;
   assert pulseSupport  -> libpulseaudio != null;
   
   assert iwSupport     -> ! nlSupport && wirelesstools != null;
  
positive.code:       fetchSubmodules = true;
      };
  
      meta = with lib; {
        homepage = "https://polybar.github.io/";
        description = "A fast and easy-to-use tool for creating status bars";
  
negative.code:       maintainers = with maintainers; [ afldcr Br1ght0ne ];
        platforms = platforms.linux;
      };
  }
  