Access denied error encountered while building ASP.NET Core from source

I am trying to build the ASP .NET Core from the Github source code.

I checked out the tag v5.0.0-preview.5.20279.2.

I already had the latest available Visual Studio (16.6.2) installed.

When I ran .\restore.cmd, it installed a bunch of things then spat out the following error.

I don't think the access is denied error is a file permission error as I tried running again in Administrator session of cmd and got the same errros.

I have had this issue on two separate machines so I don't think it is machine specific issue.

C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018: The "InstallDotNetCore" task failed unexpectedly. [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018: System.ComponentModel.Win32Exception (0x80004005): Access is denied [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:  [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018: Server stack trace:  [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo) [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at System.Diagnostics.Process.Start() [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at System.Diagnostics.Process.Start(ProcessStartInfo startInfo) [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at Microsoft.DotNet.Arcade.Sdk.InstallDotNetCore.Execute() in /_/src/Microsoft.DotNet.Arcade.Sdk/src/InstallDotNetCore.cs:line 137 [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs) [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg) [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:  [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018: Exception rethrown at [0]:  [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at Microsoft.Build.Framework.ITask.Execute() [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\InstallDotNetCore.targets(15,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext() [C:\Users\ShaneMcPherson\.nuget\packages\microsoft.dotnet.arcade.sdk\5.0.0-beta.20261.9\tools\Tools.proj]
Build failed.