anchor.diff:  }:
     stdenv.mkDerivation rec {
       pname = "waybar";
  -    version = "0.9.0";
  +    version = "0.9.1";
   
       src = fetchFromGitHub {
         owner = "Alexays";
         repo = "Waybar";
         rev = version;
  -      sha256 = "1w8a6jih872ry288k8ic6mjfi9ccf1jwc24wnh9p5c7w73247c2c";
  +      sha256 = "0drlv8im5phz39jxp3gxkc40b6f85bb3piff2v3hmnfzh7ib915s";
       };
   
       nativeBuildInputs = [
  -      meson ninja pkgconfig scdoc wrapGAppsHook
  +      meson ninja pkgconfig scdoc wrapGAppsHook cmake
       ];
   
       buildInputs = with stdenv.lib;
  -      [ wayland wlroots gtkmm3 libinput libsigcxx jsoncpp fmt spdlog gtk-layer-shell ]
  +      [ wayland wlroots gtkmm3 libinput libsigcxx jsoncpp fmt spdlog gtk-layer-shell howard-hinnant-date ]
         ++ optional  traySupport  libdbusmenu-gtk3
         ++ optional  pulseSupport libpulseaudio
         ++ optional  nlSupport    libnl
  
positive.code: { stdenv, fetchFromGitHub, meson, pkgconfig, ninja, wrapGAppsHook
  , wayland, wlroots, gtkmm3, libinput, libsigcxx, jsoncpp, fmt, scdoc, spdlog, gtk-layer-shell
  , traySupport  ? true,  libdbusmenu-gtk3
  , pulseSupport ? false, libpulseaudio
  , nlSupport    ? true,  libnl
  
negative.code:       license = licenses.mit;
        maintainers = with maintainers; [ FlorianFranzen minijackson synthetica ];
        platforms = platforms.unix;
        homepage = "https://github.com/alexays/waybar";
      };
    }
  