sys-auth/pam_fprint package is obsolete and should be removed from portage. PAM module for libfprint is provided by sys-auth/fprintd with "pam" use-flag. That had been mentioned in upstream mailing list at http://lists.freedesktop.org/archives/fprint/2012-January/000086.html Reproducible: Always
Gentoo is about the freedom of choice. pam_fprint does not need dbus or policykit, so RESO/WONT.