anchor.diff:  SET PREBUILTDIR=prebuilt
   MKDIR %PREBUILTDIR% >NUL 2>&1
   powershell -nologo -noprofile -command "try { (New-Object Net.WebClient).DownloadFile('%DLURL%', '%PREBUILTDIR%\temp.zip') } catch {exit 1}"
  -IF NOT %ERRORLEVEL% == 0 ( ECHO Failed downloading %DLURL% & EXIT /B 1 )
  +IF ERRORLEVEL 1 ( ECHO Failed downloading %DLURL% & EXIT /B 1 )
   powershell -nologo -noprofile -command "Add-Type -AssemblyName System.IO.Compression.FileSystem; $zip=[System.IO.Compression.ZipFile]::OpenRead('%PREBUILTDIR%\temp.zip'); foreach ($item in $zip.Entries) { try {$file=(Join-Path -Path .\%PREBUILTDIR% -ChildPath $item.FullName); $null=[System.IO.Directory]::CreateDirectory((Split-Path -Path $file)); [System.IO.Compression.ZipFileExtensions]::ExtractToFile($item,$file,$true)} catch {exit 1} }"
  -IF NOT %ERRORLEVEL% == 0 ( ECHO Failed extracting downloaded archive & EXIT /B 1 )
  +IF ERRORLEVEL 1 ( ECHO Failed extracting downloaded archive & EXIT /B 1 )
   DEL /F /Q %PREBUILTDIR%\\temp.zip
   ECHO.
   EXIT /B %ERRORLEVEL%
   
   :exitOnError
  -cd %CURRDIR%
  +cd "%CURRDIR%"
   SET ERROR=1
   
   :exit
  
positive.code:     REM Clone from the origin repo
      SET REPOURL=%UPSTREAMURL%/%REPONAME%.git
      git clone !REPOURL! --quiet
      IF %ERRORLEVEL% NEQ 0 (
          ECHO %REPONAME%: Git clone failed.
          GOTO exitOnError
      )
  
negative.code:         )
      )
  )
  cd "%CURRDIR%" >NUL
  GOTO exit
  
  REM Function to clone or update a repo
  