Cannot publish ubuntu-x64 standalone app on windows

Steps to reproduce

1. Restore packages
2. PS C:\Source\cli-samples\HelloMvc> dotnet publish -r ubuntu-x64

HelloMVC with the following project.json

{
  "buildOptions": {
    "preserveCompilationContext": true,
    "emitEntryPoint": true,
    "debugType": "portable"
  },
  "publishOptions": {
    "include": [
      "wwwroot",
      "Views"
    ]
  },
  "dependencies": {
    "Microsoft.AspNetCore.Diagnostics": "1.0.0-*",
    "Microsoft.AspNetCore.Mvc": "1.0.0-*",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-*",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-*",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0-*",
    "Microsoft.Extensions.Logging.Console": "1.0.0-*",
    "Microsoft.NETCore.App": {
      "version": "1.0.0-*"
    }
  },
  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "portable-net45+wp80+win8+wpa81+dnxcore50",
        "portable-net451+win8"
      ]
    }
  },
  "tools": {
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": {
      "version": "1.0.0-*",
      "imports": "portable-net45+wp80+win8+wpa81+dnxcore50"
    }
  },
  "scripts": {
    "postpublish": "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%"
  }, 

  "runtimes": { 
    "ubuntu-x64": {}
  }
}

Expected behavior

Publishing succeeds.

Actual behavior

PS C:\Source\cli-samples\HelloMvc> dotnet publish -r ubuntu-x64
Publishing HelloMvc for .NETCoreApp,Version=v1.0/ubuntu-x64
Project HelloMvc (.NETCoreApp,Version=v1.0) will be compiled because expected outputs are missing
Compiling HelloMvc for .NETCoreApp,Version=v1.0

Compilation succeeded.
    0 Warning(s)
    0 Error(s)

Time elapsed 00:00:01.9402395
Failed to make the following project runnable: HelloMvc (.NETCoreApp,Version=v1.0) reason: Expected coreclr library not found in package graph. Please try running dotnet restore again.
Published 0/1 projects successfully

Environment data

dotnet --info output:

PS C:\Source\cli-samples\HelloMvc> dotnet --info
.NET Command Line Tools (1.0.0-rc2-002655)

Product Information:
 Version:     1.0.0-rc2-002655
 Commit Sha:  3e96a05f9c

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.10586
 OS Platform: Windows
 RID:         win10-x64

[moozzyk]

If I put ubuntu.14.04-x64 in my project.json and use this as the -r value then I don’t get an error. Still the experience sucks - if I use a RID I cannot publish for in my project.json I should get an error/warning (possibly during restore).

[moozzyk]

How am I supposed to know that I need to use exact RID? My runtime section looks just like this:

  "runtimes": { 
    "ubuntu-x64": {}
  }

so there is no version.