EF7: dnx ef command error "Value can not be Null" - asp.net

Question

When I use the command
dnx ef
the following error occurs:
C:\Users\Livio\OneDrive\Informatik\Websites\HomeNetwork\src\HomeNetwork.API>dnx ef
System.ArgumentNullException: Value cannot be null.
Parameter name: appEnv
at Microsoft.Data.Entity.Utilities.Check.NotNull[T](T value, String parameterName)
at Microsoft.Data.Entity.Commands.Program..ctor(IServiceProvider > serviceProvider, IApplicationEnvironment appEnv, ILibraryManager libraryManager, > IRuntimeEnvironment runtimeEnv)
I'm using dnvm 1.0.0-beta8 coreclr x86.
My project.json looks like this (in HomeNetwork.API)
{
"webroot": "wwwroot",
"version": "1.0.0-*",
"dependencies": {
"Microsoft.AspNet.Mvc": "6.0.0-beta5",
"Microsoft.AspNet.Server.IIS": "1.0.0-beta5",
"Microsoft.AspNet.Server.WebListener": "1.0.0-beta5",
"Microsoft.AspNet.StaticFiles": "1.0.0-beta5",
"EntityFramework.SqlServer": "7.0.0-beta5",
"EntityFramework.Commands": "7.0.0-beta5"
},
"commands": {
"web": "Microsoft.AspNet.Hosting --config hosting.ini",
"ef": "EntityFramework.Commands"
},
"frameworks": {
"dnx451": { },
"dnxcore50": { }
},
"exclude": [
"wwwroot",
"node_modules",
"bower_components"
],
"publishExclude": [
"node_modules",
"bower_components",
"**.xproj",
"**.user",
"**.vspscc"
]
}
I created this project without editing the code, expect adding the EF7 Dependency.

Answer 1

I'm using dnvm 1.0.0-beta8 coreclr x86.
Then, you should use the beta8 versions of the dependencies:
"dependencies": {
"Microsoft.AspNet.Mvc": "6.0.0-beta8",
"Microsoft.AspNet.Server.IIS": "1.0.0-beta8",
"Microsoft.AspNet.Server.WebListener": "1.0.0-beta8",
"Microsoft.AspNet.StaticFiles": "1.0.0-beta8",
"EntityFramework.SqlServer": "7.0.0-beta8",
"EntityFramework.Commands": "7.0.0-beta8"
}