anchor.diff:  
     configureFlags = [
       "--audio-drv-list=${audio}"
  +    "--disable-strip" # We'll strip ourselves after separating debug info.
       "--enable-docs"
       "--enable-tools"
       "--enable-guest-agent"
  
positive.code: { lib, stdenv, fetchurl, fetchpatch, python, zlib, pkg-config, glib
  , perl, pixman, vde2, alsa-lib, texinfo, flex
  , bison, lzo, snappy, libaio, libtasn1, gnutls, nettle, curl, ninja, meson, sigtool
  , makeWrapper, autoPatchelfHook
  , attr, libcap, libcap_ng
  , CoreServices, Cocoa, Hypervisor, rez, setfile
  , numaSupport ? stdenv.isLinux && !stdenv.isAarch32, numactl
  
negative.code:   dontUseMesonConfigure = true; # meson's configurePhase isn't compatible with qemu build
  
    outputs = [ "out" "ga" ];
    separateDebugInfo = true;
  
    patches = [
      ./fix-qemu-ga.patch
  