Stopped bootstrap reporting that it will substitute a build drive, thereby scaring the living daylights out of innocent users, when it won't any way (because this is the bootstrap).

@echo off
setlocal
if not defined HELIUM_HOME set HELIUM_HOME=%~dp0..\..\..\..\helium
echo %HELIUM_HOME%
call %HELIUM_HOME%\hlm.bat %*
endlocal