Dynamically inject angular modules as dependency

I am trying to inject angular module dynamically after some event as -

app.requires.push('projects');
console.log(app.requires);

I am referring to this link How to inject modules to main Angular app module on the fly to inject the module on occurrence of an event.

I have created a plunkr for the complete poc I have created. So on app.requires call it actually pushes projects module as dependency however when I click on link navigating to states defined inside the projects module, it logs an error stating Could not resolve 'projects.login' from state ''. Although these links work if I inject to module at the start only like guides module.

PS: Loading of project module happens upon clicking of button in index route.