anchor.diff:      libXrender
       libcacard
       libjpeg
  +    libopus
       lz4
       openssl
  +    orc
       pixman
       python3.pkgs.pyparsing
       zlib
  
positive.code: , ninja
  , pkgconfig
  , pixman
  , celt_0_5_1
  , alsaLib
  , openssl
  , libXrandr
  
negative.code: , cyrus_sasl
  , libcacard
  , lz4
  , libopus
  , gst_all_1
  , orc
  }:
  
  stdenv.mkDerivation rec {
  