anchor.diff:  , useSELinux ? false
   , naclSupport ? false
   , useOpenSSL ? true
  +, enableGnomeSupport ? false
   , gnomeKeyringSupport ? false
   , useProprietaryCodecs ? false
   }:
  
positive.code:     linux_use_gold_flags = false;
      proprietary_codecs = false;
      use_gnome_keyring = gnomeKeyringSupport;
      disable_nacl = !naclSupport;
      use_openssl = useOpenSSL;
      selinux = useSELinux;
  
negative.code:     utillinux alsaLib
      gcc bison gperf
      krb5
      glib gtk dbus_glib
      libXScrnSaver libXcursor
    ] ++ stdenv.lib.optional gnomeKeyringSupport libgnome_keyring
      ++ stdenv.lib.optionals enableGnomeSupport [ gconf libgcrypt ];
  
    opensslPatches = stdenv.lib.optional useOpenSSL openssl.patches;
  
  