anchor.diff:          let withLicenseReadme f = [ "license.txt", None, None; "readme.txt", None, None; ] @ f
           NuGet (updateNuspec pack outPath NugetSymbolPackage.None withLicenseReadme) "build/MathNet.Numerics.Extension.nuspec"
           CleanDir "obj/NuGet"
  +    DeleteDir "obj/NuGet"
   
   
   // --------------------------------------------------------------------------------------
  
positive.code:         // second pass - generate only normal package, again, but this time explicitly drop the sources (and the debug symbols)
          NuGet (updateNuspec pack outPath NugetSymbolPackage.None (withLicenseReadme >> withoutSymbolsSources)) "build/MathNet.Numerics.nuspec"
          CleanDir "obj/NuGet"
  
  let nugetPackExtension (bundle:Bundle) outPath =
      CleanDir "obj/NuGet"
  
negative.code: 
  let publishNuGet packageFiles =
      // TODO: Migrate to NuGet helper once it supports direct (non-integrated) operations
      CleanDir "obj/NuGet"
      let rec impl trials file =
          trace ("NuGet Push: " + System.IO.Path.GetFileName(file) + ".")
          try
  