anchor.diff:  
       src = upstream-info.main;
   
  -    nativeBuildInputs = [ gn which python perl pkgconfig ];
  +    nativeBuildInputs = [ gn which python2Packages.python perl pkgconfig ];
   
       buildInputs = defaultDependencies ++ [
         nspr nss systemd
  
positive.code: , xdg_utils, yasm, minizip, libwebp
  , libusb1, pciutils, nss, re2, zlib, libvpx
  
  , python, pythonPackages, perl, pkgconfig
  , nspr, systemd, kerberos
  , utillinux, alsaLib
  , bison, gperf
  
negative.code:       glib gtk2 dbus_glib
        libXScrnSaver libXcursor libXtst mesa
        pciutils protobuf speechd libXdamage
        python2Packages.ply python2Packages.jinja2
      ] ++ optional gnomeKeyringSupport libgnome_keyring3
        ++ optionals gnomeSupport [ gnome.GConf libgcrypt ]
        ++ optional enableSELinux libselinux
  