Seems polkit-kde-agent-0.99.1 was released 2 years ago.
*polkit-kde-agent-0.99.1 (09 Dec 2014) 09 Dec 2014; Manuel Rüger <mrueg@gentoo.org> +polkit-kde-agent-0.99.1.ebuild: Version bump. Fixes bug #530452. Thanks to Nikoli for noticing.