anchor.diff:  :: Now we declare a scope
   Setlocal EnableDelayedExpansion EnableExtensions
   
  -if "%LUAROCKS_VER%" NEQ "HEAD" (
  -	set LUAROCKS_SHORTV=%LUAROCKS_VER:~0,3%
  -) else (
  -	:: Assume 2.2 for the time being. TODO: fix this
  -	set LUAROCKS_SHORTV=2.2
  -)
  -
   if not defined LUAROCKS_URL set LUAROCKS_URL=http://keplerproject.github.io/luarocks/releases
   if not defined LUAROCKS_REPO set LUAROCKS_REPO=https://luarocks.org
   if not defined LUA_URL set LUA_URL=http://www.lua.org/ftp
  
positive.code: ) else (
  	set COMPATFLAG=
  )
  if not defined LUAJIT_GIT_REPO set LUAJIT_GIT_REPO=http://luajit.org/git/luajit-2.0.git
  if not defined LUAJIT_URL set LUAJIT_URL=http://luajit.org/download
  
  if not defined LR_EXTERNAL set LR_EXTERNAL=c:\external
  if not defined LUAROCKS_INSTALL set LUAROCKS_INSTALL=%LUA_DIR%\LuaRocks
  if not defined LR_ROOT set LR_ROOT=%LUAROCKS_INSTALL%\%LUAROCKS_SHORTV%
  if not defined LR_SYSTREE set LR_SYSTREE=%LUAROCKS_INSTALL%\systree
  
  if not defined SEVENZIP set SEVENZIP=7z
  
negative.code: 		) else (
  			set lj_source_folder=%APPVEYOR_BUILD_FOLDER%\downloads\luajit-%LJ_VER%
  			if not exist !lj_source_folder! (
  				echo Downloading... %LUAJIT_URL%/v%LJ_VER%.tar.gz
  				curl --location --silent --fail --max-time 120 --connect-timeout 30 %LUAJIT_URL%/v%LJ_VER%.tar.gz | %SEVENZIP% x -si -so -tgzip | %SEVENZIP% x -si -ttar -aoa -odownloads
  			)
  			cd !lj_source_folder!\src
  		)
  