Hi!

The offload build works, yay!...all the way up to

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix build --system=i586-gnu \
   -e '(@@ (gnu packages commencement) glibc-final-with-bootstrap-bash)'
/gnu/store/cah6lzl8cxdhfink3a1ij0m1p5vk66kw-glibc-intermediate-2.31-debug
/gnu/store/i7l6dnq6br3jg5qzhfssrp11mg499d2b-glibc-intermediate-2.31
/gnu/store/lr2ymww5imjl3hxrzyc7dmsadw7dxbdh-glibc-intermediate-2.31-static
--8<---------------cut here---------------end--------------->8---

With static-bash-for-glibc, however, it goes off track

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix build --system=i586-gnu \
   -e '(@@ (gnu packages commencement) static-bash-for-glibc)'
The following derivations will be built:
   /gnu/store/gv40jpz4g0hbia28wa6d50z9x6ncgdlh-bash-static-5.0.16.drv
   /gnu/store/apj2ihazv6x3anhvfvmmqrkyak05p9yc-gcc-cross-boot0-wrapped-7.5.0.drv
   /gnu/store/yfpy5b3xqkarxchyhi339fw2ldwczj1d-linux-libre-headers-5.4.20.drv
--8<---------------cut here---------------end--------------->8---

...oops!  Note that a native build on the Childhurd works all the way up
to "hello".

The "glibc-final-with-bootstrap-bash" has a propagated-inputs that looks
like this

--8<---------------cut here---------------start------------->8---
(define* (kernel-headers-boot0 #:optional (system (%current-system)))
  (match system
    ("i586-gnu" hurd-core-headers-boot0)
    (_ linux-libre-headers-boot0)))

(define glibc-final-with-bootstrap-bash
   [..]
   (propagated-inputs `(("kernel-headers" ,(kernel-headers-boot0))))
   [..])
--8<---------------cut here---------------end--------------->8---

In KERNEL-HEADERS-BOOT0, SYSTEM is "x86_64-linux".  Passing SYSTEM from
a LET-SYSTEM clause (see attached patch) seems to fix this...but i'm
afraid that triggers a world rebuild.  Our offload Childhurds can only
run master, right?  Is there any way around this?  Thoughts?

Greetings,
--a-mildly-disappointed--
Janneke