anchor.diff:  
   // Dependencies
   "Clean"
  +    ==> "CopyArtefacts"
       ==> "CreatePackage"
       ==> "CreateSourceZip"
       ==> "All"
  
positive.code: 
  // Paths
  let root = "./"
  let buildDir = "./build/tmp/"
  let packagingRoot = "./build/packaging/"
  let deployDir = "./build/publish/"
  
negative.code: // Targets
  Target "Clean" (fun _ ->
      CleanDirs [ buildDir; packagingRoot; deployDir ]
  )
  
  Target "CopyArtefacts" (fun _ ->
      let targetDir = buildDir @@ "dist"
      let sourceDir = artefactsDir
      CopyDir targetDir sourceDir (fun x -> true)
  )
  
  let dependencies = [ ]
  