anchor.diff:      ];
   
     patchFlags = [ "-p0" ];
  -
  -  postPatch = stdenv.lib.optionalString stdenv.isDarwin ''
  -    substituteInPlace nss/coreconf/Darwin.mk --replace '@executable_path/$(notdir $@)' "$out/lib/\$(notdir \$@)"
  -  '';
   
     outputs = [ "out" "dev" "tools" ];
   
  
positive.code: 
    depsBuildBuild = [ buildPackages.stdenv.cc ];
  
    nativeBuildInputs = [ perl ninja (buildPackages.python3.withPackages (ps: with ps; [ gyp ])) ];
  
    buildInputs = [ zlib sqlite ]
      ++ stdenv.lib.optional stdenv.isDarwin fixDarwinDylibNames;
  
negative.code: { stdenv, fetchurl, nspr, perl, zlib, sqlite, darwin, fixDarwinDylibNames, buildPackages, ninja }:
  
  let
    nssPEM = fetchurl {
  