anchor.diff:    cmakeFlags = ["-Dstatic=OFF" "-DBoost_NO_BOOST_CMAKE=ON"];
   
     nativeBuildInputs = [ pkgconfig cmake git ];
  -  buildInputs = [ openssl openssl.dev boostSharedStatic zlib grpc c-ares c-ares.cmake-config abseil-cpp protobuf3_8 ];
  +  buildInputs = [ openssl openssl.dev boostSharedStatic zlib grpc c-ares c-ares.cmake-config abseil-cpp protobuf3_8 libnsl ];
   
     preConfigure = ''
       export HOME=$PWD
  
positive.code: { stdenv, fetchFromGitHub, fetchgit, fetchurl, runCommand, git, cmake, pkgconfig
  , openssl,  zlib, boost, grpc, c-ares, abseil-cpp, protobuf3_8 }:
  
  let
    sqlite3 = fetchurl rec {
  
negative.code:   };
  
    boostSharedStatic = boost.override {
      enableShared = true;
      enabledStatic = true;
    };
  
  