anchor.diff:      owner = "erlang";
       repo = "otp";
       rev = "OTP-${version}";
  -    sha256 = "120dqi8h2fwqfmh9g2nmkf153zlglzw9kkddz57xqvqq5arcs72y";
  +    sha256 = "06pr4ydrqpp1skx85zjb1an4kvzv6vacb771vy71k54j7w6lh9hk";
     };
   
     buildInputs =
  
positive.code: stdenv.mkDerivation rec {
    name = "erlang-" + version + "${optionalString odbcSupport "-odbc"}"
    + "${optionalString javacSupport "-javac"}";
    version = "19.1.6";
  
    # Minor OTP releases are not always released as tarbals at
    # http://erlang.org/download/ So we have to download from
  
negative.code:       ++ stdenv.lib.optionals stdenv.isDarwin [ Carbon Cocoa ];
  
    debugInfo = enableDebugInfo;
  
    prePatch = ''
      substituteInPlace configure.in \
        --replace '`sw_vers -productVersion`' '10.10'
    '';
  
    preConfigure = ''
      ./otp_build autoconf
  