The ebuild for markups-0.2.4 blocks Python3.3 but it does install just fine when one admits Python3.3 Please upgrade the ebuild.
+ 03 Jul 2013; Tom Wijsman <TomWij@gentoo.org> markups-0.2.4.ebuild: + Added and tested Python 3.3 compatibility, fixes bug #475478 reported by + Helmut Jarausch.