Using Nancy with CoreCLR (doesn't work)

HomeModule.cs

namespace WebApplication1
{
  using Nancy;

  public class HomeModule: NancyModule
  {
    public HomeModule() 
    {
        Get["/"] = _ => "Goodbye from Nancy";
    }

  }

}

project.json

{

   "commands": {
     "web": "Microsoft.AspNet.Hosting --server kestrel"
   },

   "dependencies": {
      "Kestrel": "1.0.0-beta",
      "Nancy": "1.0.0.0",
      "Microsoft.AspNet.Owin": "1.0.0-beta",
      "Microsoft.AspNet.Hosting": "1.0.0-beta",
      "Microsoft.AspNet.Server.WebListener": "1.0.0-beta"
   },

   "frameworks": {
      "aspnetcore50": {
        /* No idea what I actually need here */
        "System.Collections": "4.0.0.0",
        "System.Collections.Concurrent": "4.0.0.0",
        "System.ComponentModel": "4.0.0.0",
        "System.Linq": "4.0.0.0",
        "System.Reflection": "4.0.10.0",
        "System.Runtime": "4.0.0.0",
        "System.Runtime.InteropServices": "4.0.10.0",
        "System.Threading": "4.0.0.0",
        "System.Threading.Tasks": "4.0.0.0"
      }
   }

}

Startup.cs

using Microsoft.AspNet.Builder;
using Nancy.Owin;

public class Startup 
{
    public void Configure(IApplicationBuilder config) {
        config.UseOwin(x=> x.UseNancy());
    }
}