anchor.diff:      owner = "erlang";
       repo = "otp";
       rev = "OTP-${version}";
  -    sha256 = "1vsykghhzpgmc42jwj48crl11zzzpvrqvh2lk8lxfqbflzflxm6j";
  +    sha256 = "0nnjj069d5pjhgcd8vvqbrkjdac3p1v4s3zb59i4h73vg7f5p736";
     };
   
     buildInputs =
  
positive.code:       ++ stdenv.lib.optionals stdenv.isDarwin [ Carbon Cocoa ];
  
    debugInfo = enableDebugInfo;
  
    envAndCpPatch = fetchurl {
       url = "https://github.com/binarin/otp/commit/9f9841eb7327c9fe73e84e197fd2965a97b639cf.patch";
       sha256 = "10h5348p6g279b4q01i5jdqlljww5chcvrx5b4b0dv79pk0p0m9f";
    };
  
    patches = [
      envAndCpPatch
    ];
  
    preConfigure = ''
      ./otp_build autoconf
  
negative.code: stdenv.mkDerivation rec {
    name = "erlang-" + version + "${optionalString odbcSupport "-odbc"}"
    + "${optionalString javacSupport "-javac"}";
    version = "19.1";
  
    # Minor OTP releases are not always released as tarbals at
    # http://erlang.org/download/ So we have to download from
  