not supported in the stable branch.
behavior with respect to build time dependencies that are not strictly
required.
.TP
-.BR "\-\-depclean\-lib\-check[=n]"
-Account for library link-level dependencies during
-\fB-\-depclean\fR and \fB-\-prune\fR actions. This
-option is enabled by default. In some cases this can
-be somewhat time\-consuming.
-.TP
.BR "\-\-emptytree " (\fB\-e\fR)
Reinstalls target atoms and their entire deep
dependency tree, as though no packages are currently