anchor.diff:      CleanDir buildAppDir
   )
   
  -Target "BuildWww" (fun _ ->
  +Target "PreBuildWww" (fun _ ->
       let npm = tryFindFileOnPath (if isUnix then "npm" else "npm.cmd")
       let errorCode = match npm with
                         | Some g -> Shell.Exec(g, "install", appSrcDir)
  
positive.code: open System.IO
  open Fake 
  open Fake.AssemblyInfoFile
  
  // Directories
  let buildAppDir = "./build/app/"
  
negative.code:     printfn "  > BuildApp"
      printfn "  > BuildTests"
      printfn "  > BuildWithTests"
      printfn " "
      printfn " [Run]"
      printfn "  > RunWithRedeploy"
      printfn " "
      printfn " [Help]"
      printfn "  > ?"
  