anchor.diff:  , libevent, expat, libjpeg
   , libpng, libxml2, libxslt
   , xdg_utils, yasm, zlib
  -, libexif
  +, libusb1, libexif
   
   , python, perl, pkgconfig
   , nspr, udev, krb5
  
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
    ];
  
    maybeSeccompPatch = let
  