was badly bumped as it uses a local copy of dev-ml/sexplib if its not installed; in -r2 i've made it depend on it so that the system version is always used but x86 keyword is missing...
I added ~x86 to dev-ml/type-conv dev-ml/sexplib dev-util/coccinelle-0.2.5-r2 but I ran into bug 376115 (not a regression, though).