anchor.diff:          else
               Directory.CreateDirectory(targetFolder) |> ignore
   
  -            fixDatesInArchive fileName            
  +            fixArchive fileName
               ZipFile.ExtractToDirectory(fileName, targetFolder)
   
               // cleanup folder structure
  
positive.code:     with
      | exn -> traceWarnfn "Could not fix timestamps in %s. Error: %s" fileName exn.Message
  
  let findLocalPackage directory (packageName:PackageName) (version:SemVerInfo) = 
      let v1 = FileInfo(Path.Combine(directory, sprintf "%O.%O.nupkg" packageName version))
      if v1.Exists then v1 else
  
negative.code:             raise exn
              return! getDetailsFromNuGetViaOData auth nugetURL packageName version
      } 
  
  let fixDatesInArchive fileName =
      try
          use zipToOpen = new FileStream(fileName, FileMode.Open)
  