anchor.diff:      libxslt
       docbook-xsl-nons
       docbook_xml_dtd_43
  -  ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
  +  ] ++ lib.optionals stdenv.isDarwin [
  +    fixDarwinDylibNames
  +  ] ++ lib.optionals withIntrospection [
  +    gobject-introspection
  +  ];
   
     propagatedBuildInputs = [
       glib
  
positive.code: , libjpeg
  , libpng
  , gnome
  , gobject-introspection
  , doCheck ? false
  , makeWrapper
  , lib
  }:
  
  let
  
negative.code: 
    mesonFlags = [
      "-Dgtk_doc=${lib.boolToString withGtkDoc}"
      "-Dintrospection=${if withIntrospection then "enabled" else "disabled"}"
      "-Dgio_sniffing=false"
    ];
  
  