Using mustache.js partials with express

So this may be a case of me completely misunderstanding functionality, but I am trying to use partials in node.js so that I have a reusable, reinsertable header and footer on my various templates similar to {% extends 'something.html' %} in django or <? includes 'something.php ?> in php. As I understand it this is what partials are for.

So in my app.js uses this configuration to render templates:

var mustache = require('mustache');
var template = {
    compile: function (source, options) {
        if (typeof source == 'string') {
            return function(options) {
                options.locals = options.locals || {};
                options.partials = options.partials || {};
                if (options.body) // for express.js > v1.0
                    locals.body = options.body;
                return mustache.to_html(
                    source, options.locals, options.partials);
            };
        } 
        else {
            return source;
        }
    },
    render: function (template, options) {
        template = this.compile(template, options);
        return template(options);
    }
};

// Configuration
app.configure(function(){
    app.register(".html", template);
    app.set('views', __dirname + '/views');
    app.set('view options', {layout: false});
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(app.router);
    app.use(express.static(__dirname + '/public'));
});

and then I have this route:

var header = require("../views/header.html");

module.exports = function(app){
app.all('/test', function(req, res){
    var data = {
        locals: {value: "some value"},
        partials: {header: header}
    }
    res.render('test.html', data);
});

header.html is simply this:

hello world

and test.html is simply this:

{{>header}}
{{ value }}

I would expect that this would render:

hello world
some value

but I get an unexpected token error when I run node app.js pointing to hello world in my header.html as the problem.

what am I missing in configuring this so that it will work?