anchor.diff:        ++ stdenv.lib.optionals stdenv.isDarwin [ Carbon Cocoa ];
   
     debugInfo = enableDebugInfo;
  +
  +  prePatch = ''
  +    substituteInPlace configure.in \
  +      --replace '`sw_vers -productVersion`' '10.10'
  +  '';
   
     preConfigure = ''
       ./otp_build autoconf
  
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:     owner = "erlang";
      repo = "otp";
      rev = "OTP-${version}";
      sha256 = "06pr4ydrqpp1skx85zjb1an4kvzv6vacb771vy71k54j7w6lh9hk";
    };
  
    buildInputs =
  