anchor.diff:  assert stdenv.isLinux;
   
   stdenv.mkDerivation rec {
  -  version = "233";
  +  version = "234";
     name = "systemd-${version}";
   
     src = fetchFromGitHub {
       owner = "nixos";
       repo = "systemd";
  -    rev = "72782e7ad96f9da9b0e5873f87a64007068cee06";
  -    sha256 = "1cj20zrfr8g0vkxiv3h9bbd89xbj3mrsij3rjr1lbh4nkl5mcwpa";
  +    rev = "ba777535a890c2a2b7677dfacc63e12c578b9b3f";
  +    sha256 = "1cj20zrfr8g0vkxiv3h9bbd89xbj3mrsij3rja1lbh4nkl5mcwpa";
     };
   
     outputs = [ "out" "lib" "man" "dev" ];
  
positive.code: 
    enableParallelBuilding = true;
  
    /*
    # some libs fail to link to liblzma and/or libffi
    postFixup = let extraLibs = stdenv.lib.makeLibraryPath [ xz.out libffi.out zlib.out ];
      in ''
        for f in "$out"/lib/*.so.0.*; do
          patchelf --set-rpath `patchelf --print-rpath "$f"`':${extraLibs}' "$f"
        done
      '';
    */
  
    # The interface version prevents NixOS from switching to an
    # incompatible systemd at runtime.  (Switching across reboots is
    # fine, of course.)  It should be increased whenever systemd changes
  
negative.code:         --replace /usr/lib/systemd/catalog/ $out/lib/systemd/catalog/
  
        configureFlagsArray+=("--with-ntp-servers=0.nixos.pool.ntp.org 1.nixos.pool.ntp.org 2.nixos.pool.ntp.org 3.nixos.pool.ntp.org")
      '';
  
    PYTHON_BINARY = "${coreutils}/bin/env python"; # don't want a build time dependency on Python
  