anchor.diff:  , directfb
   , fdk_aac
   , flite
  +, gsm
   , libaom
   , libdc1394
   , libde265
  
positive.code:     directfb
      fdk_aac
      flite
      libaom
      libdc1394
      libde265
  
negative.code: 
      "-Ddts=disabled" # required `libdca` library not packaged in nixpkgs as of writing, and marked as "BIG FAT WARNING: libdca is still in early development"
      "-Dfaac=${if faacSupport then "enabled" else "disabled"}"
      "-Diqa=disabled" # required `dssim` library not packaging in nixpkgs as of writing
      "-Dmsdk=disabled" # not packaged in nixpkgs as of writing / no Windows support
      # As of writing, with `libmpcdec` in `buildInputs` we get
  