anchor.diff:  { system, stdenv, stdenv_32bit, lib, pkgs, pkgsi686Linux, callPackage, callPackage_i686,
  +  overrideCC, wrapCCMulti, gcc49,
     pulseaudioSupport,
     wineRelease ? "stable"
   }:
  
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:   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 ];
  