anchor.diff:  
     src = fetchurl {
       url = "https://downloads.mongodb.org/src/mongodb-src-r${version}.tar.gz";
  -    sha256 = "625eb28fd47b2af63b30343a064de7f42e5265f4c642874ec766ba3643fd80d7";
  +    sha256 = "5a904b66d09e4d15f3ed35028a004640afcba5d8ecb5644165bd08cd7eb79df6";
     };
   
     nativeBuildInputs = [
  
positive.code: }:
  
  let
    version = "3.2.11";
  
    inherit (stdenv.lib)
      concatStringsSep;
  
negative.code:       rev = "1a93e9f9c3689a6b85e2db14cec0f25ea26b1296";
        file = "m/mongodb/0002-boost-1.62.patch";
        sha256 = "8ad9640407be6f945b38275ff75014c8ba2c6118a25fba63a490c640267b4b66";
      })
    ];
  
  