set(NSIS_WIN_VERSION $ENV{PROCESSOR_ARCHITEW6432})
if(NSIS_WIN_VERSION MATCHES "")
set(NSIS_WIN_VERSION $ENV{PROCESSOR_ARCHITECTURE})
set(NSIS_WIN_VERSION $ENV{PROCESSOR_ARCHITEW6432})
if(NSIS_WIN_VERSION MATCHES "")
set(NSIS_WIN_VERSION $ENV{PROCESSOR_ARCHITECTURE})