EBUILD_PHASE can also take values "clean", "package" and "cleanrm".
that's bleed through from portages implementation; user bashrc can intercept on those, but ebuilds cannot.
(In reply to comment #1) > user bashrc can intercept on those So those can be mentioned in PMS.
Nope. These are not relevant for PMS.
PMS is concerned with the interface between ebuilds and package manager, and says nothing about user configuration. Since these values are not relevant for ebuilds, they're effectively user config details and thus shouldn't be in PMS.