You'll also need mzscheme in your path; just download it from http://www.plt-scheme.org (v372 will work), and make sure you add the directory containing the binary to your PATH variable (`export PATH="$PATH:/path/to/the/directory/containing/the/mzscheme/binary"`).
I think that's everything, but I already had a highly customized setup. Feel free to ask any other further questions, but error messages/problems encountered would be helpful in those cases.