anchor.diff:          .SourcesFromProject()
           .References(fun r ->
               [
  -                r.NuGet("Owin").Reference()
  -                r.NuGet("Microsoft.Owin").Reference()
  -                r.NuGet("CommonServiceLocator").Reference()
  -                r.NuGet("WebSharper.Owin").Reference()
  +                r.NuGet("Owin").ForceFoundVersion().Reference()
  +                r.NuGet("Microsoft.Owin").ForceFoundVersion().Reference()
  +                r.NuGet("CommonServiceLocator").ForceFoundVersion().Reference()
  +                r.NuGet("WebSharper.Owin").ForceFoundVersion().Reference()
                   r.Project owinws
                   r.File(MPServiceLocation)
                   r.Assembly("System.Configuration")
  
positive.code:             [
                  r.NuGet("Owin").Reference().CopyLocal()
                  r.NuGet("Microsoft.Owin").Reference().CopyLocal()
                  r.NuGet("WebSharper.Owin").Reference().CopyLocal()
                  r.NuGet("Microsoft.Owin.Hosting").Reference().CopyLocal()
                  r.NuGet("Microsoft.Owin.StaticFiles").Reference().CopyLocal()
  
negative.code: let bt =
      BuildTool().PackageId("WebSharper.Owin.WebSocket")
          .VersionFrom("WebSharper")
          .WithFSharpVersion(FSharpVersion.FSharp30)
          .WithFramework(fun fw -> fw.Net45)
  
  open System.IO
  
  