System.UnauthorizedAccessException: Access to the path 'protobuf-net\Windows' is denied.

[hach-que]

While resolving packages:

18  Marking Newtonsoft.Json as ignored for Git
19  Unpacking binary package from tar/lzma archive
20  Binary resolution complete
21  Resolving: http://protobuild.org/hach-que/protobuf-net
22  Package type not specified (and no file at protobuf-net\.git), requesting binary version.
23  Creating and emptying protobuf-net\Windows
24  System.UnauthorizedAccessException: Access to the path 'protobuf-net\Windows' is denied.
25     at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
26     at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, Object dirSecurityObj, Boolean checkHost)
27     at System.IO.Directory.InternalCreateDirectoryHelper(String path, Boolean checkHost)
28     at Protobuild.PackageManager.ResolveLibraryBinary(PackageRef reference, String platform, String source, Boolean forceUpgrade)
29     at Protobuild.PackageManager.Resolve(ModuleInfo module, PackageRef reference, String platform, String templateName, Nullable`1 source, Boolean forceUpgrade)
30     at Protobuild.PackageManager.ResolveAll(ModuleInfo module, String platform)
31     at Protobuild.ResolveCommand.Execute(Execution execution)
32     at Protobuild.MainClass.Main(String[] args)
33  Finished submodule package resolution for ThirdParty
34  Starting generation of projects for Windows
35  Loading: Protogame
36  Loading: Protogame.Tests

Protobuild should detect the failure (even when it occurs in a submodule).