anchor.diff:      "-Dwasapi=disabled" # not packaged in nixpkgs as of writing / no Windows support
       "-Dwasapi2=disabled" # not packaged in nixpkgs as of writing / no Windows support
       "-Dwpe=disabled" # required `wpe-webkit` library not packaged in nixpkgs as of writing
  -    "-Dzxing=disabled" # required `zxing-cpp` library not packaged in nixpkgs as of writing
       "-Disac=disabled" # depends on `webrtc-audio-coding-1` not compatible with 0.3
       "-Dgs=disabled" # depends on `google-cloud-cpp`
       "-Donnx=disabled" # depends on `libonnxruntime` not packaged in nixpkgs as of writing
  
positive.code:     srt
      vo-aacenc
      libfreeaptx
    ] ++ lib.optionals enableZbar [
      zbar
    ] ++ lib.optionals faacSupport [
  
negative.code: , srt
  , vo-aacenc
  , libfreeaptx
  , zxing-cpp
  , VideoToolbox
  , AudioToolbox
  , AVFoundation
  