[racket] Embedding Racket into a Program

According to the Inside Racket C API 
(http://docs.racket-lang.org/inside/overview.html) example
embedding Racket into a program requires the 'raco ctool --c-mods base.c 
++lib racket/base' command, but it gives an error:
raco ctool: unknown switch: ++lib

I guess it is different with raco than it was with mzc.

Is it still possible to encapsulate racket/base in the generated c file?

I'm using Racket v5.0 on OS X 10.5.

best,
Gabor