+let images_dir = runtime_base_dir ^ "/icons"
+let gtkrc_file = runtime_base_dir ^ "/matita.gtkrc"
+let lang_file = runtime_base_dir ^ "/matita.lang"
+let script_template = runtime_base_dir ^ "/matita.ma.templ"
+let matita_conf = runtime_base_dir ^ "/matita.conf.xml"