bug#69465: "unbound variable" but it's not?

[Nathan Dehnel <ncdehnel@gmail.com>]

"unbound variable" for rust-objc-0.2 but I see nothing wrong with it.
package made with guix import

during guix pull:

Generating package cache for
'/gnu/store/cyh6zz1x9br8p8rv0mszwvi76pb95fh6-profile'...

Backtrace:
(repl-version 0 1 1)
Generating package cache for
'/gnu/store/asq2jgvil9n9grm8jb3ia2ypbkgvpcn3-profile'...
WARNING: (gooby-channel packages osandov-linux): `zlib' imported from
both (guix licenses) and (gnu packages compression)

Backtrace:
In guix/repl.scm:
   141:4 19 (machine-repl _ _)
   126:7 18 (_)
In ice-9/boot-9.scm:
 1747:15 17 (with-exception-handler #<procedure 7ffff1d32180 at ic?> ?)
 1752:10 16 (with-exception-handler _ _ #:unwind? _ # _)
In guix/repl.scm:
   99:21 15 (_)
In unknown file:
         14 (_ #<procedure 7ffff78846c0 at guix/repl.scm:100:25 ()> ?)
         13 (primitive-load "/gnu/store/1vn5x4lh4mpyjm13cykmsb8aacb?")
In ice-9/boot-9.scm:
 1752:10 12 (with-exception-handler _ _ #:unwind? _ # _)
In gnu/packages.scm:
  439:11 11 (generate-package-cache _)
In srfi/srfi-1.scm:
  460:18 10 (fold #<procedure expand-cache expr> _ _)
In gnu/packages.scm:
  399:37  9 (expand-cache . _)
In guix/packages.scm:
 1378:17  8 (supported-package? #<package rust-eframe@0.26.2 gooby?> ?)
In guix/memoization.scm:
   101:0  7 (_ #<hash-table 7fffebe3cc80 23125/28099> #<package ru?> ?)
In guix/packages.scm:
 1356:39  6 (_)
 1618:16  5 (package->bag _ _ _ #:graft? _)
 1723:43  4 (thunk)
In gooby-channel/packages/test.scm:
   39:37  3 (arguments #<package rust-eframe@0.26.2 gooby-channel/p?>)
In ice-9/boot-9.scm:
 1685:16  2 (raise-exception _ #:continuable? _)
 1780:13  1 (_ #<&compound-exception components: (#<&undefined-vari?>)
In unknown file:
          0 (backtrace #<undefined>)

(exception unbound-variable (value #f) (value "Unbound variable: ~S")
(value (rust-objc-0.2)) (value #f))

(define-module (gooby-channel packages test)
  #:use-module (guix packages)
  #:use-module (gnu packages)
  #:use-module (guix build-system cargo)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix git-download)
  #:use-module (guix download)
  #:use-module (gnu packages crates-io)
  #:use-module (gnu packages crates-graphics)
  #:use-module (gnu packages crypto)
)

(define-public rust-eframe-0.26
  (package
    (name "rust-eframe")
    (version "0.26.2")
    (source
     (origin
       (method url-fetch)
       (uri (crate-uri "eframe" version))
       (file-name (string-append name "-" version ".tar.gz"))
       (sha256
        (base32 "0vzjpm6kmqnnyhsvm4gq7yi7033m7mq88x15h2vnigqkdnxw2mn4"))))
    (build-system cargo-build-system)
    (arguments
     `(#:skip-build? #t
       #:cargo-inputs (
                       ("rust-objc" ,rust-objc-0.2)

)
))
    (home-page "https://github.com/emilk/egui/tree/master/crates/eframe")
    (synopsis
     "egui framework - write GUI apps that compiles to web and/or natively")
    (description
     "egui framework - write GUI apps that compiles to web and/or natively")
    (license (list license:expat license:asl2.0))))