dev-php/YAML-1.x should use php-pear-lib-r1 eclass since it is a pear library originating from pear.symfony-project.com and not pear.php.net. It also has no way of discovering the pear channel as a result.
+*YAML-1.0.6-r1 (14 Jan 2015)
+ 14 Jan 2015; Brian Evans <firstname.lastname@example.org> +YAML-1.0.6-r1.ebuild,
+ Revbump to use php-pear-lib-r1 wrt bug 452678; Drop old