Pathologic was missing because of a .git folder inside.

[yaffs-website] / node_modules / invert-kv / index.js

'use strict';
module.exports = function (obj) {
        if (typeof obj !== 'object') {
                throw new TypeError('Expected an object');
        }

        var ret = {};

        for (var key in obj) {
                var val = obj[key];
                ret[val] = key;
        }

        return ret;
};