How to handle Nuget File Conflict?

Hi

Any ideas on how to handle a file conflict when using nuget package restore?

Our builds are hanging awaiting input to confirm overwriting a file in the appstart folder of a mvc web project, any ideas how to stop it from hanging?

Update
Unchecking the Update Packages checkbox did the trick, although i feel that there should be a mechanism to specify a default response to stop the build just sitting there waiting for input...