anchor.diff:      libXrender
       libcacard
       libjpeg
  +    libopus
       lz4
       openssl
  +    orc
       pixman
       python3.pkgs.pyparsing
       zlib
  
positive.code: 
    mesonFlags = [
      "-Dauto_features=enabled"
      "-Dopus=disabled"
      "-Dgstreamer=no"
    ];
  
    postInstall = ''
  
negative.code: , cyrus_sasl
  , libcacard
  , lz4
  , libopus
  , gst_all_1
  , orc
  }:
  
  stdenv.mkDerivation rec {
  