let matita_conf  = runtime_base_dir ^ "/matita.conf.xml"
 let closed_xml = runtime_base_dir ^ "/closed.xml"
 let gtkmathview_conf = runtime_base_dir ^ "/gtkmathview.matita.conf.xml"
-let stdlib_dir_devel = runtime_base_dir ^ "/library"
 let new_stdlib_dir_devel = runtime_base_dir ^ "/nlibrary"
-let stdlib_dir_installed = runtime_base_dir ^ "/ma/standard-library"
 let new_stdlib_dir_installed = runtime_base_dir ^ "/ma/new-standard-library"
 let help_dir = runtime_base_dir ^ "/help"
 
 
     wants [Registry] init_status;
     let includes = ref [] in
     let default_includes = [ 
-      BuildTimeConf.stdlib_dir_devel;
-      BuildTimeConf.stdlib_dir_installed ; 
       BuildTimeConf.new_stdlib_dir_devel;
       BuildTimeConf.new_stdlib_dir_installed ; 
     ]