[Haskell-cafe] separate cabal installations on separate machines

Hello, I have server where my home directory resides. I use cabal from (at least) two machines with different processors (i386, powerpc) and the common home directory. I noticed that there is a --global option which does the right thing and places the installs in /usr/local, but it looks like it still stores some info, particularly about configuration state, in /home/${USER}/.cabal. How do I invoke cabal to make sure that the entire installation is machine specific ? Thanks, Brian