anchor.diff:                      Dependencies = 
                           ["Machine.Fakes",version
                            flavour,flavourVersion]
  -                    AccessKey = getBuildParamOrDefault "nugetkey" ""
  -                    Publish = hasBuildParam "nugetkey" })  
  +                    AccessKey = NugetKey
  +                    Publish = NugetKey <> "" })
                   "machine.fakes.nuspec"
   
               [nugetDir + sprintf "Machine.Fakes.%s.%s.nupkg" flavour version]
  
positive.code:             Version = version                        
              OutputPath = nugetDir
              Dependencies = ["Machine.Specifications",MSpecVersion]
              AccessKey = key
              Publish = key <> "" })
          "machine.fakes.nuspec"
  
      [nugetDir + sprintf "Machine.Fakes.%s.nupkg" version]
  
negative.code:     [buildDir + "Machine.Fakes.dll"]
          |> CopyTo nugetLibDir
  
      
      NuGet (fun p -> 
          {p with               
              Authors = authors
  