anchor.diff:  
   , useSELinux ? false
   , naclSupport ? false
  +, useOpenSSL ? true
   , gnomeKeyringSupport ? false
   , useProprietaryCodecs ? false
   }:
  
positive.code:     bzip2 ffmpeg flac # harfbuzz
      icu libevent expat libjpeg
      libpng libwebp libxml2 libxslt # skia
      speex sqlite openssl # stlport
      v8 xdg_utils yasm zlib
    ];
  
  
negative.code: , v8, xdg_utils, yasm, zlib
  
  , python, perl, pkgconfig
  , nspr, nss, udev
  , utillinux, alsaLib
  , gcc, bison, gperf
  , krb5
  