Lilypond variables

[Phil Holmes]

I'm trying to kick of a GUB build, but accessing my Ubuntu build machine 
via a different route, because of problems I had earlier with my Windows 
machine crashing.  I'm using a Remote Desktop Connection from my Windows 
machine.  The user interface looks fairly different, but everything 
seems to be there - except the variables like $LILYPOND_GIT and 
$LILYPOND_BUILD_DIR.  I assume that the file that's run on logging in 
directly and which sets these variables isn't being run.  Is there a way 
to set them manually by running the same file?  If so, which would it 
be?  Or is there a better way?

Thanks in advance
Phil H