anchor.diff:      meson
       ninja
       pkg-config
  +    gtk-doc
  +    docbook-xsl-nons
  +    docbook_xml_dtd_43
  +    docbook_xml_dtd_45
     ];
   
     buildInputs = [
  
positive.code: 
    # outputs TODO: share/gobject-introspection-1.0/tests is needed during build
    # by pygobject3 (and maybe others), but it's only searched in $out
    outputs = [ "out" "dev" "man" ];
    outputBin = "dev";
  
    src = fetchurl {
  
negative.code:     "--datadir=${placeholder "dev"}/share"
      "-Ddoctool=disabled"
      "-Dcairo=disabled"
      "-Dgtk_doc=true"
    ];
  
    doCheck = !stdenv.isAarch64;
  