anchor.diff:  
     nativeBuildInputs = [ autoconf makeWrapper perl gnum4 libxslt libxml2 ];
   
  -  buildInputs = [ ncurses openssl ]
  +  buildInputs = [ ncurses opensslPackage ]
       ++ optionals wxSupport wxPackages2
       ++ optionals odbcSupport odbcPackages
       ++ optionals javacSupport javacPackages
  
positive.code: , javacSupport ? false, javacPackages ? [ openjdk8 ]
  , odbcSupport ? false, odbcPackages ? [ unixODBC ]
  , withSystemd ? stdenv.isLinux # systemd support in epmd
  , wxPackages ? [ libGL libGLU wxGTK xorg.libX11 ]
  , preUnpack ? "", postUnpack ? ""
  , patches ? [], patchPhase ? "", prePatch ? "", postPatch ? ""
  
negative.code:     ./otp_build autoconf
    '';
  
    configureFlags = [ "--with-ssl=${opensslPackage.dev}" ]
      ++ optional enableThreads "--enable-threads"
      ++ optional enableSmpSupport "--enable-smp-support"
      ++ optional enableKernelPoll "--enable-kernel-poll"
  