anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "davmail";
  -  version = "5.4.0";
  +  version = "5.5.1";
     src = fetchurl {
  -    url = "mirror://sourceforge/${pname}/${version}/${pname}-${version}-3135.zip";
  -    sha256 = "05n2j5canh046744arvni6yfdsandvjkld93w3p7rg116jrh19gq";
  +    url = "mirror://sourceforge/${pname}/${version}/${pname}-${version}-3299.zip";
  +    sha256 = "sha256-NN/TUOcUIifNzrJnZmtYhs6UVktjlfoOYJjYaMEQpI4=";
     };
   
     sourceRoot = ".";
  
positive.code:     description = "A Java application which presents a Microsoft Exchange server as local CALDAV, IMAP and SMTP servers";
      maintainers = [ maintainers.hinton ];
      platforms = platforms.all;
      license = licenses.gpl2;
    };
  }
  
negative.code:   nativeBuildInputs = [ makeWrapper unzip ];
  
    installPhase = ''
      runHook preInstall
      mkdir -p $out/share/davmail
      cp -vR ./* $out/share/davmail
      makeWrapper $out/share/davmail/davmail $out/bin/davmail \
        --prefix PATH : ${jre}/bin \
        --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ glib gtk2 libXtst ]}
      runHook postInstall
    '';
  
    meta = with lib; {
  