Ebuild execution is divided into a series of phases. In order to implement a phase, an ebuild defines a function to serve as an entry point for execution of that phase. This design is similar to the template method pattern that is commonly used in object oriented programming languages. An ebuild can inherit or override a template method from an eclass. The function names for the ebuild phases, listed in order of execution: pkg_setup src_unpack src_compile src_test src_install pkg_preinst pkg_postinst pkg_prerm pkg_postrm