That gives me this:

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix build -s i586-gnu hello -d --no-grafts

;;; ("x86_64-linux")
In ice-9/boot-9.scm:
  1736:10 30 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
In unknown file:
          29 (apply-smob/0 #<thunk 7f59f45ab580>)
In ice-9/boot-9.scm:
    718:2 28 (call-with-prompt _ _ #<procedure default-prompt-handler (k proc)>)
In ice-9/eval.scm:
    619:8 27 (_ #(#(#<directory (guile-user) 7f59f41e8f00>)))
In guix/ui.scm:
  1953:12 26 (run-guix-command _ . _)
    663:2 25 (call-with-error-handling _)
In ice-9/boot-9.scm:
  1736:10 24 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
  1731:15 23 (with-exception-handler #<procedure 7f59f1f734b0 at ice-9/boot-9.scm:1815:7 (exn)> _ #:unwind? _ # _)
In guix/status.scm:
    776:4 22 (call-with-status-report _ _)
In ice-9/boot-9.scm:
  1736:10 21 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
In guix/store.scm:
   631:22 20 (thunk)
   1299:8 19 (call-with-build-handler #<procedure 7f59f1f8c930 at guix/ui.scm:1069:2 (continue store things mod…> …)
In guix/scripts/build.scm:
    925:2 18 (_)
In ice-9/boot-9.scm:
  1731:15 17 (with-exception-handler #<procedure 7f59e300e750 at ice-9/boot-9.scm:1815:7 (exn)> _ #:unwind? _ # _)
  1736:10 16 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
In guix/ui.scm:
    440:6 15 (_)
In guix/scripts/build.scm:
    927:5 14 (_)
In srfi/srfi-1.scm:
   673:15 13 (append-map #<procedure 7f59e3015dc0 at guix/scripts/build.scm:927:17 (system)> ("i586-gnu"))
   586:17 12 (map1 ("i586-gnu"))
In guix/scripts/build.scm:
   929:20 11 (_ _)
In guix/store.scm:
   1340:2 10 (map/accumulate-builds #<store-connection 256.99 7f59f1fb09b0> _ _)
In srfi/srfi-1.scm:
   586:17  9 (map1 (#<package hello@2.10 gnu/packages/base.scm:74 7f59e57f0820>))
In guix/store.scm:
   1299:8  8 (call-with-build-handler #<procedure build-accumulator (continue store things mode)> _)
In guix/scripts/build.scm:
   888:18  7 (_ _)
In guix/packages.scm:
  1075:16  6 (package-derivation _ #<package hello@2.10 gnu/packages/base.scm:74 7f59e57f0820> _ #:graft? _)
  1393:22  5 (thunk)
    927:4  4 (bag->derivation #<store-connection 256.99 7f59f1fb09b0> #<<bag> name: "hello-2.10" system: "i586-…> …)
   812:23  3 (transitive-inputs _)
In gnu/packages/commencement.scm:
  3304:44  2 (propagated-inputs #<package glibc-intermediate@2.31 gnu/packages/commencement.scm:3263 7f59e6856d20>)
  3121:23  1 (kernel-headers-boot0 _)
In unknown file:
           0 (make-stack #t)
--8<---------------cut here---------------end--------------->8---

At that point, it looks like a déjà-vu to me.  :-)

Should be fixed with efb10f175fa6323024aa471c58ea1da445085298.

Thanks,
Ludo’.