anchor.diff:      # GUI-related libraries, so it shouldn't be re-added lightly.
       (mesonFeatureFlag "cairo" false)
       (mesonFeatureFlag "introspection" isNativeCompilation)
  +    # chafa is only used in a development utility, not in the library
  +    (mesonFeatureFlag "chafa" false)
     ];
   
     nativeBuildInputs = [
  
positive.code:     docbook_xml_dtd_43
    ];
  
    buildInputs = [ glib freetype fontconfig ]
      ++ lib.optionals withCoreText [ ApplicationServices CoreText ]
      ++ lib.optionals isNativeCompilation [ gobject-introspection ];
  
  
negative.code: }:
  
  let
    version = "2.8.1";
    inherit (lib) optional optionals optionalString;
    mesonFeatureFlag = opt: b:
      "-D${opt}=${if b then "enabled" else "disabled"}";
  