anchor.diff:      "--enable-large-config"
     ];
   
  -  meta = with stdenv.lib; {
  +  meta = with lib; {
       description = "The Boehm-Demers-Weiser conservative garbage collector for C and C++";
       homepage = http://hboehm.info/gc/;
       license = licenses.free;
  
positive.code:   src = fetchurl {
      url = "https://github.com/ivmai/bdwgc/releases/download/v${version}/gc-${version}.tar.gz";
      # We need the multihash because they delete old releases
      multihash = "QmQk6ZAat55XZWmDAekm9yNazs7unB68ocjWUA7VwKqHzE";
      sha256 = "bd112005563d787675163b5afff02c364fc8deb13a99c03f4e80fdf6608ad41e";
    };
  
    buildInputs = [
  
negative.code: { stdenv
  , fetchurl
  , lib
  
  , libatomic_ops
  }:
  
  let
    version = "7.6.4";
  in
  stdenv.mkDerivation rec {
    name = "boehm-gc-${version}";
  