In an example embodiment, a delivery unit comprises a plurality of objects. The delivery unit is encapsulated within a transport container for delivery to an entity for installation. As new versions of the objects are created by modifying the source code, the modified versions of objects are included in the delivery unit along with unmodified versions of the remaining objects of the delivery unit. The modified versions of the objects are marked for installation, while the unmodified versions are not marked for installation. Upon installation, the objects marked for installation are extracted from the delivery unit while the objects not marked for installation are discarded. The extracted objects are then installed, thus updating any previous versions of the objects, while unmodified objects are not installed. In one representative embodiment, objects are procedures of a database system, which may be organized hierarchically into folders.