anchor.diff:  REM ============================================
   echo Check NSIS is in your PATH
   REM ============================================
  -if "%PROCESSOR_ARCHITECTURE%" == "AMD64" ( 
  -    SET "PRGROOT=%programfiles(x86)%" 
  -) 
  -if "%PROCESSOR_ARCHITECTURE%" == "x86" ( 
  -    SET PRGROOT=%programfiles% 
  +
  +
  +if "%PROCESSOR_ARCHITECTURE%" == "AMD64" (
  +    setlocal enabledelayedexpansion
  +    SET PRGROOT=!programfiles(x86^)!
  +    setlocal disabledelayedexpansion
  +)
  +if "%PROCESSOR_ARCHITECTURE%" == "x86" (
  +    setlocal enabledelayedexpansion
  +    SET PRGROOT=!programfiles!
  +    setlocal disabledelayedexpansion
   )
   
   set NSIS_EXEC="%PRGROOT%\NSIS\makensis.exe"
  
positive.code: @echo off 
  set OLDDIR=%CD%
  cd /d %~dp0
  REM ============================================
  
negative.code: if not exist include/gpac/revision.h goto Abort
  
  REM check if found a local commit which has not been pushed
  for /f "delims=" %%a in ('git diff FETCH_HEAD') do @set diff=%%a
  echo diff = %diff%
  if not "%diff%"=="" goto RevisionAbort
  
  REM execute git and check if the result if found within revision.h
  for /f "delims=" %%a in ('git describe --tags --long') do @set VERSION=%%a
  