Version 0.9.5 is available upstream. Please consider updating! It seems that version 0.9.5 is available upstream, while the latest version in the Gentoo tree is 0.9.4. You think this warning is false? Read more about it here.
NGINX JavaScript, also known as NJS, is a dynamic module for NGINX that enables the
extension of built-in functionality using familiar JavaScript syntax. The NJS language is a
subset of JavaScript, compliant with ES5 (ECMAScript 5.1 Strict Variant) with some ES6
(ECMAScript 6) and newer extensions.