eleventyNavigationToHtml ignores --pathprefix value

[JensGabe]

When using the --pathprefix command line argument together with the url filter ensures that the paths are prefixed as requested.

The eleventyNavigationToHtml simply ignores this value because of the following code:

if(eleventyConfig.pathPrefix !== undefined) {
	return function(url) {
		return url;
	};
}

I do not know if the !== is a typo, or I'm missing something in regarding how to get the pathprefix command line argument redirected into the navigation filter?