anchor.diff:      "-Dwith_docs=true"
     ];
   
  +  preInstall = ''
  +    export LC_ALL="en_US.utf-8"
  +  '';
  +
     pythonPath = with python3.pkgs; requiredPythonModules [ pygobject3 ];
   
     preFixup = ''
  
positive.code: { stdenv
  , desktop-file-utils
  , docbook_xsl
  , fetchurl
  , flatpak
  , gnome3
  , gobjectIntrospection
  , gspell
  
negative.code:     #appstream-glib # tests fail if these tools are available
      desktop-file-utils
      docbook_xsl
      docbook_xml_dtd_43
      glibcLocales # for Meson's gtkdochelper
      gobjectIntrospection
      gtk-doc
      hicolor-icon-theme
  