anchor.diff:    propagatedBuildInputs = [
       colord
       gtk3
  +    gtk4
     ];
   
     meta = with lib; {
  
positive.code: { lib, stdenv
  , fetchurl
  , colord
  , gettext
  
negative.code:     gobject-introspection
      gtk-doc
      docbook-xsl-ns
      docbook-xsl-nons
      docbook_xml_dtd_412
      libxslt
    ];
  