+# ok, so the logic should be simple, just yum update the world
+# however there are many cases in the real life where this
+# just does not work, because of a glitch somewhere
+# so, we force the update of crucial pkgs independently, as
+# the whole group is sometimes too much to swallow
+# this one is builtin
+UPDATE_PACKAGES_BUILTIN=[ 'NodeManager' ]
+# and operations can also try to push a list through a conf_file
+UPDATE_PACKAGES_OPTIONAL_PATH='/etc/planetlab/NodeUpdate.packages'
+