As per the summery, Miau had a new version release some weeks ago. The current ebuild merges and runs on hardened/amd64 fine with just a rename. Reproducible: Always Steps to Reproduce:
Net-irc team overwhelmed again?
*miau-0.6.6 (24 May 2011) 24 May 2011; Dawid Węgliński <cla@gentoo.org> +miau-0.6.6.ebuild: Version bump (bug #346105)