安装RavenDb Embedded时出现Nuget依赖性错误

我试图在ASP.NET MVC 5应用程序中安装RavenDB.Embedded,但我有这种依赖性错误:

PM> Install-Package RavenDB.Embedded
Attempting to resolve dependency 'RavenDB.Database (= 2.5.2750)'.
Attempting to resolve dependency 'System.Spatial (? 5.2)'.
Attempting to resolve dependency 'WindowsAzure.Storage (? 2.0)'.
Attempting to resolve dependency 'Microsoft.WindowsAzure.ConfigurationManager (? 1.7.0.0)'.
Attempting to resolve dependency 'Microsoft.Data.OData (? 5.0.2)'.
Attempting to resolve dependency 'Microsoft.Data.Edm (= 5.0.2)'.
Attempting to resolve dependency 'System.Spatial (= 5.0.2)'.
Install-Package : Updating 'System.Spatial 5.2.0' to 'System.Spatial 5.0.2' failed. Unable to find a version of 'RavenDB.Database' that is compatible with 'System.Spatial 5.0.2'.
At line:1 char:1
+ Install-Package RavenDB.Embedded
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], InvalidOperationException
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PowerShell.Commands.InstallPackageCommand

除了手动安装之外,还有其他选择吗？