anchor.diff:      libevent expat libjpeg
       libpng libxml2 libxslt
       xdg_utils yasm zlib
  -    libexif
  +    libusb1 libexif
     ];
   
     maybeSeccompPatch = let
  
positive.code:     use_system_libexif = true;
      use_system_libjpeg = true;
      use_system_libpng = true;
      use_system_libxml = true;
      use_system_speex = true;
      use_system_ssl = cfg.openssl;
  
negative.code: , libevent, expat, libjpeg
  , libpng, libxml2, libxslt
  , xdg_utils, yasm, zlib
  , libusb1, libexif
  
  , python, perl, pkgconfig
  , nspr, udev, krb5
  