anchor.diff:  :: Create the packages
   set "src=%~dp0src"
   cd "%src%"
  -for /d %%d in (*) do (
  +for /d %%d in (%dirs%) do (
       cd "%%d"
       del /q *.nupkg > nul 2>&1
       "%nuget%" pack %%d.nuspec -Prop Version=%version%
  
positive.code: @echo off
  setlocal
  
  :: Parse arguments
  :arg_loop
  
negative.code: if /i "%~1" == "-h" goto usage
  if /i "%~1" == "-?" goto usage
  if /i "%~1" == "--help" goto usage
  
  if /i "%~1" == "-d" (
      set "dirs=%~2"
      shift
  )
  
  if /i "%~1" == "--dirs" (
      set "dirs=%~2"
      shift
  )
  
  if /i "%~1" == "-v" (
      set "version=%~2"
  