useful only if \fBprelink\fR(8) is installed and accurate checksums (despite
prelinking) are needed for some reason such as for checking the integrity of
installed files or because the \fIunmerge\-orphans\fR feature is disabled.
+
+Note that normal emerging of packages from source computes the
+checksums before things will be prelinked, so in such cases, this
+feature isn't required either. Undoing prelinking while merging is
+only required when using tools like \fBquickpkg\fR(1) which can cause
+already prelinked files to be merged.
.TP
.B preserve\-libs
Preserve libraries when the sonames change during upgrade or downgrade.