I used this description to get the nightly build of ASP.NET MVC for my project
Its pulls the assemblies sucesfully from nuget and I can run the project.
I now try to debug into the pdb pulled from the MS symbol server. Thats actually the point: I dont know if these symbols are realy located on the servers. Either I am doing something wrong or symbols are not available.
Here are my debug settings:

These are my symbol servers

This is what I see when I try to step into a method located in System.Web.Mvc.dll

These are the modules loaded:

I downloaded the nightly build on the third of september. Is there anything I am missing?
I experienced exactly the same issue. You need to use the Symbols hosted on MyGet. Please see:
来源:https://stackoverflow.com/questions/12333706/debug-into-nightly-build-of-asp-net-mvc4-using-symbolserver