anchor.diff:      //-- "src/*/*/obj/*.props"
       //-- "src/*/*/obj/*.paket.references.cached"
       //-- "src/*/*/obj/*.NuGet.Config"
  -    |> File.DeleteFiles
  +    |> File.deleteAll
   
       Shell.CleanDirs [buildDir; testDir; docsDir; apidocsDir; nugetDncDir; nugetLegacyDir; reportDir]
   
  
positive.code: 
  #endif
  
  open System.IO
  open Fake.Core
  open Fake.Tools
  
negative.code:     for framework in ["netstandard1.6"; "net45"] do
        let dir = __SOURCE_DIRECTORY__ </> "packages"</>packDir</>"lib"</>framework
        let targetFile = dir </>  "FAKE.FSharp.Compiler.Service.dll"
        File.Delete targetFile
  
  #if DOTNETCORE
        let reader =
  