cabal-install use multiple config files?

[Stephen Paul Weber]

I don't see a command-line switch to ask cabal-install to use a different 
config file.  Is there an environment variable for it or something?  I want 
to use the same cabal-install binary with three different installs of ghc 
and ghc-pkg to allow me to maintain my cross-compiler packages as well.

-- 
Stephen Paul Weber, @singpolyma
See <http://singpolyma.net> for how I prefer to be contacted
edition right joseph