[racket] Scribble: requiring an LP from another LP

I'm new to Scribble and I'm running into some problems splitting my
literate program across multiple files.

The documentation says an rkt file with a "#lang scribble/lp" can be
required from another Racket program like any other rkt file. That works
fine, but requiring one scribble/lp from another doesn't seem to work. In
particular, functions defined in the dependent scribble/lp aren't available
to @chunks in the referencing scribble/lp, even when they're explicitly
exposed via (provide ...).

To clarify, here's an example involving a few files placed in the same
directory.


;; FILE: main.scrbl
> #lang scribble/base
> @require[scribble/lp-include]
> @lp-include["prelude.rkt"]
> @lp-include["chapter1.rkt"]
>




;; FILE: prelude.rkt
> #lang scribble/lp
> @chunk[<prelude>
> (provide atom?)
> (define atom?
>   (lambda (x)
>     (and (not (pair? x)) (not (null? x)))))]
>
>

;; FILE: chapter1.rkt (fails to access the Prelude's definition of "atom?")
> #lang scribble/lp
> @require["prelude.rkt"]
> @chunk[<atom?-test>
> (define atom-test (atom? 1))]
>
>

;; FILE: prelude-lib-test.rkt (successfully accesses "atom?")
> #lang racket
> (require "prelude.rkt")
>


(define atom-test (atom? 1))


In prelude-lib-test.rkt atom-test evaluates to #t as expected. However,
when I try to evaluate atom-test from chapter1.rkt I'm met with this error:

atom-test: undefined;
>  cannot reference an identifier before its definition


Is there something else I should try, or is requiring LPs from LPs like
this not currently supported?

Cheers,
Jake
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