Your package depends explicitly on dev-lang/ruby:1.8. Versions in this slot are no longer supported upstream and this slot will be removed from Gentoo shortly. Please adapt your package to use a newer slot of ruby or mask it for removal if it is not compatible.
Thank you for letting me know. + 04 Sep 2013; Tom Wijsman <TomWij@gentoo.org> +ec2-ami-tools-1.4.0.5-r2.ebuild, + -ec2-ami-tools-1.4.0.2.ebuild, -ec2-ami-tools-1.4.0.5-r1.ebuild: + Revison bump. Depend on Ruby 1.9. Let's see if things break; given that it is Amazon, I assume not...