anchor.diff:    outputs = [ "out" "dev" ];
   
     doCheck = true;
  +  enableParallelBuilding = true;
   
     meta = with lib; {
       homepage = "https://github.com/ngtcp2/ngtcp2";
       description = "ngtcp2 project is an effort to implement QUIC protocol which is now being discussed in IETF QUICWG for its standardization.";
       license = licenses.mit;
  -    platforms = platforms.linux;
  +    platforms = platforms.unix;
       maintainers = with maintainers; [ izorkin ];
     };
   }
  
positive.code:     sha256 = "sha256-uBmD26EYT8zxmHD5FuHCbEuTdWxer/3uhRp8PhUT87M=";
    };
  
    nativeBuildInputs = [ autoreconfHook pkg-config cunit file ];
    buildInputs = [ jemalloc libev nghttp3 quictls ];
  
    preConfigure = ''
      substituteInPlace ./configure --replace /usr/bin/file ${file}/bin/file
  
negative.code: { lib, stdenv, fetchFromGitHub
  , autoreconfHook, pkg-config
  , cunit, file, ncurses
  , jemalloc, libev, nghttp3, quictls
  }:
  
  