/usr/sbin/dispatch-conf needs sys-apps/less at runtime, please update the rdepend So, at least it should pull in virtual/pager
Since bug 384663, it's supposed to use the PAGER variable: http://git.overlays.gentoo.org/gitweb/?p=proj/portage.git;a=commit;h=3be910392f1186cacf0796e952fb5dae38b10f57