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I have tried to launch the NASA Tv for wp8 app,on my windows 8 but Iam seeing the following errors

Topics: Windows Phone 8
Jul 14, 2014 at 10:33 AM
Error 1 This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them. For more information, see C:\Users\shravan\Downloads\phonesm-45ee4449f092bacd4f5725b18bf8ddf2da3cdf7e(1)\Source\Phone\NasaTv.WP8\NasaTv.WP8.csproj NasaTv.WP8.

How to do it. I cannot see the Enable nuget package Restore option