msi utils (windows installer) is a tiny set of helpers for MSI related manipulation.
API
GUID2Packed
const MSI = require('msi-utils');
var myMSIGUID = '{12345678-ABCD-WXYZ-1234-ABCDEFGHIJKL}';
//get the derivated packed GUID
var packed = MSI.GUID2Packed(myMSIGUID);