[gambit-list] gsc doesn't recognize -exe option?

I'm trying to compile a trivial program, using gsc 4.2.8 on Ubuntu 10.04. My source file is named hello.ss, and contains one line:

(display "hello")

I try to compile it with this command:

$ gsc -exe hello.ss

I get the following error:

*** WARNING -- Unknown or improperly placed option: "exe"

It runs fine under the interpreter if I type "gsi hello.ss", and if I omit the -exe and just type "gsc hello.ss", it compiles to an object file, as expected. So I don't think that Ubuntu's Gambit installation is bad...

Any ideas on what's going on would be greatly appreciated.

-- Matt