There's a merged pull request on the void-packages repository

racket: update to 8.6.
https://github.com/void-linux/void-packages/pull/38566

Description:
<!-- Uncomment relevant sections and delete options which are not applicable -->

#### Testing the changes
- I tested the changes in this PR: **YES**

Adapting to new build system.

Use ncurses for new expeditor repl.

Cross-compiles but not tested.