anchor.diff:  { stdenv
  -, autoreconfHook
   , fetchTritonPatch
   , fetchurl
   , gettext
  -, gtk-doc
   , intltool
   , lib
   , makeWrapper
  +, meson
  +, ninja
   
   , adwaita-icon-theme
   , atk
  
positive.code:   };
  
    nativeBuildInputs = [
      autoreconfHook
      gettext
      gtk-doc  # autoreconf
      intltool
      makeWrapper
    ];
  
    buildInputs = [
  
negative.code: 
  let
    inherit (lib)
      boolTf
      optionals
      versionOlder;
  
  