anchor.diff:  
     nativeBuildInputs = [ unzip ];
   
  -  buildInputs = [ curl hwloc gmp ];
  +  buildInputs = [ boost curl hwloc gmp ];
   
     enableParallelBuilding = true;
   
  
positive.code: { stdenv, lib, fetchurl, unzip, curl, hwloc, gmp }:
  
  let
    throwSystem = throw "Unsupported system: ${stdenv.hostPlatform.system}";
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "mprime";
    version = "30.8b15";
  
    src = fetchurl {
      url = "https://www.mersenne.org/ftp_root/gimps/p95v${lib.replaceStrings ["."] [""] version}.source.zip";
      hash = "sha256-CNYorZStHV0aESGX9LfLZ4oD5PFR2UOFLN1MiLaKw58=";
    };
  
    postPatch = ''
  