New version is available upstream. Just rename the ebuild and it compiles and works fine. I wasn't able to save an image with the previous version (9.4). With this version it's solved. Reproducible: Always
+*mirage-0.9.5.1 (06 Aug 2010) + + 06 Aug 2010; Samuli Suominen <ssuominen@gentoo.org> + +mirage-0.9.5.1.ebuild: + Version bump wrt #329811 by Geert Vanhaute.