anchor.diff:  }:
   
   stdenv.mkDerivation rec {
  -  name = "bc-1.07";
  +  name = "bc-1.07.1";
   
     src = fetchurl {
       url = "mirror://gnu/bc/${name}.tar.gz";
       hashOutput = false;
  -    sha256 = "55cf1fc33a728d7c3d386cc7b0cb556eb5bacf8e0cb5a3fcca7f109fc61205ad";
  +    sha256 = "62adfca89b0a1c0164c2cdca59ca210c1d44c3ffc46daf9931cf4942664cb02a";
     };
   
     nativeBuildInputs = [
  
positive.code:     flex
      ncurses
      readline
    ];
  
    patches = [
      (fetchTritonPatch {
        rev = "f7da28f32f73a7a392b4f4bd0fbeb90e17fdbad0";
        file = "b/bc/fix-hang.patch";
        sha256 = "64719ac2d2a1622c241f5647973122d3ca742a28649875cd29ee957bf383dc38";
      })
    ];
  
    configureFlags = [
  
negative.code: { stdenv
  , ed
  , fetchurl
  , flex
  
  