Chicken Scheme on OS X 10.7 (Lion)

I'm making another attempt at going through SICP doing all of the exercises. I've decided that chicken scheme is going to be the way I will do it. But to get it going on Lion there are some hoops to jump through thanks largely to a new version of gcc.

The method I have found that works is.

1) Download the source from the chicken scheme website.

2) Following the advice here you should pass new compiler options to make:

make C_COMPILER=gcc-4.2 PLATFORM=macosx

3) To install the additional eggs you will need to pass new options to csc like so:

CSC_OPTIONS='-cc gcc-4.2' chicken-install