anchor.diff:  
   if EXIST install (
     rmdir /s /q install
  +)
  +if EXIST install (
     rmdir install
   )
   
   if EXIST obj (
     rmdir /s /q obj
  +)
  +if EXIST obj (
     rmdir obj
   )
   mkdir obj
  
positive.code: 
    if EXIST "%PACKAGE_SUB_DIR%" (
      rmdir /s /q %PACKAGE_SUB_DIR%
      rmdir %PACKAGE_SUB_DIR%
    )
  
  
negative.code: 
  rem ############################################################
  if "%PACKAGE_COPY%" == "YES" (
    if EXIST "%ORIGINAL_PACKAGE_DIR%\copy" (
      echo.
      echo Copying extra files to source dir ...
  