anchor.diff:    wine64 = callPackage ./base.nix {
       name = "wine64-${version}";
       inherit src version pulseaudioSupport;
  +    # FIXME: drop this when GCC is updated to >5.3.
  +    # Corresponding bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69140
  +    stdenv = overrideCC stdenv gcc49;
       pkgArches = [ pkgs ];
       geckos = [ gecko64 ];
       monos =  [ mono ];
  
positive.code:   wineWow = callPackage ./base.nix {
      name = "wine-wow-${version}";
      inherit src version pulseaudioSupport;
      stdenv = stdenv_32bit;
      pkgArches = [ pkgs pkgsi686Linux ];
      geckos = [ gecko32 gecko64 ];
      monos =  [ mono ];
  
negative.code: { system, stdenv, stdenv_32bit, lib, pkgs, pkgsi686Linux, callPackage, callPackage_i686,
    overrideCC, wrapCCMulti, gcc49,
    pulseaudioSupport,
    wineRelease ? "stable"
  }:
  