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-22.214.171.124-r2.ebuild,
+ -ec2-ami-tools-126.96.36.199.ebuild, -ec2-ami-tools-188.8.131.52-r1.ebuild:
+ Revison bump. Depend on Ruby 1.9.
Let's see if things break; given that it is Amazon, I assume not...