}
		stk.Pop()
		aFmt := b.CompileAction(ModeBuild, depMode, p1)

		var deps []*Action
		if a1.buggyInstall {
			// (*Builder).vet expects deps[0] to be the package
			// and deps[1] to be "fmt". If we see buggyInstall
			// here then a1 is an install of a shared library,
			// and the real package is a1.Deps[0].
			deps = []*Action{a1.Deps[0], aFmt, a1}
		} else {

	// In this case a1.built == a.Target because a1.built == p.Target,
	// so the built target is not in the a1.Objdir tree that b.cleanup(a1) removes.
	if a1.built == a.Target {
		a.built = a.Target
		if !a.buggyInstall {
			b.cleanup(a1)
		}
		// Whether we're smart enough to avoid a complete rebuild
		// depends on exactly what the staleness and rebuild algorithms