Problem with version conflict during paket update #1186

source https://www.myget.org/F/akkadotnet/api/v2
source https://www.nuget.org/api/v2/

nuget Nuget.CommandLine
nuget Akka 
nuget Akka.Persistence 
nuget Akka.Persistence.Sql.Common 
nuget Akka.Persistence.TestKit 
nuget Akka.TestKit 
nuget Akka.TestKit.Xunit2 
nuget Google.ProtocolBuffers 
nuget Newtonsoft.Json >= 7.0.1 
nuget xunit >= 2.0.0 
nuget xunit.abstractions >= 2.0.0 
nuget xunit.assert >= 2.0.0 
nuget xunit.core >= 2.0.0 
nuget xunit.extensibility.core >= 2.0.0

.\.paket\paket.exe : Paket failed with:
At line:1 char:1
+ .\.paket\paket.exe update
+ ~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (Paket failed with::String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError

    There was a version conflict during package resolution.
  Resolved packages:
   - Akka 1.0.4
   - Akka.Persistence.Sql.Common 1.0.5.90-beta
   - Akka.Persistence.TestKit 1.0.2.9-beta
   - Akka.TestKit 0.7.0
   - Akka.TestKit.Xuni
t2 1.0.2
   - Newtonsoft.Json 7.0.1
   - xunit 2.1.0
   - xunit.abstractions 2.0.0
   - xunit.assert 2.1.0
   - xunit.core 2.1.0
   - xunit.extensibility.core 2.1.0
  Could not resolve package Akka.TestKit:
   - Dependencies file requested: 
   - Akka.TestKit.Xunit2 1.0.2 requested: >= 1.0.2

  Please try to relax some conditions.