anchor.diff:    };
   
     nativeBuildInputs = [
  -    python3
  -    yasm
  +    meson
  +    ninja
     ];
   
     buildInputs = [
  
positive.code: { stdenv
  , fetchurl
  , lib
  , python3
  , yasm
  
  , glib
  , gst-plugins-bad
  
negative.code: 
  let
    inherit (lib)
      boolYn
      optionals;
  
    sources = {
  