I would like to set the language in the REPL on the fly, with #lang, not using "-I" command-line argument. But this gives me the error "read: #lang not enabled in the current context". Is there a ...

I'm trying to get Geiser's REPL to work in Emacs, but it doesn't seem to be able to find Racket. racket is on my path, but anytime I type run-geiser followed by racket it complains: Unab...