Racket Packaging System

Question

I would like to use the R6RS library / module system, described in detail in Dybvig TSPL4 chapter 10 in Racket. I chose the "Pretty Big" language in DrRacket. But when I do

(import (list-tools setops) (more-setops) (rnrs))

in the top window and run, I get this error:

"import: misuse of the unit keyword in: (import (set-sets-sets) (greater than setops) (rnrs))"

How to write and run r6rs programs and especially use the packaging / module system as described in R6RS Standard Section 7 in Racket?

Answer 1

"Pretty Big" - ( ). R6RS. R6RS, ( " , " ), #!r6rs. .