Failure with "package-with-extra-configure-variable" & cross-gcc

The following is minimised from a manifest we are using to build a

number of cross-compilers, and related packages.

Using what is currently latest Guix:

"guix (GNU Guix) 669f0eaed6310233295fbd0a077afc9ce054c6ab"

and the following manifest:

(use-modules (guix)

(guix build-system gnu)

(gnu packages cross-base))

(define (gcc-with-extra-conf-var gcc)

(package-with-extra-configure-variable gcc "--enable-gcov" "no"))

(packages->manifest

(append

(list

(gcc-with-extra-conf-var (cross-gcc "x86_64-w64-mingw32"))

)

)

)

I see the following build failure:

guix shell --no-substitutes --container -m test.scm

The following derivations will be built:

/gnu/store/z0lgdcw0h7v8d6vjvyb63lpivqlfprvg-profile.drv

/gnu/store/07vg6708dqasnpwy2555ks8m6icrpn8h-gcc-cross-sans-libc-x86_64-w64-mingw32-11.3.0.drv

building /gnu/store/07vg6708dqasnpwy2555ks8m6icrpn8h-gcc-cross-sans-libc-x86_64-w64-mingw32-11.3.0.drv...

|builder for `/gnu/store/07vg6708dqasnpwy2555ks8m6icrpn8h-gcc-cross-sans-libc-x86_64-w64-mingw32-11.3.0.drv'

failed with exit code 1

build of /gnu/store/07vg6708dqasnpwy2555ks8m6icrpn8h-gcc-cross-sans-libc-x86_64-w64-mingw32-11.3.0.drv

failed

View build log at

'/var/log/guix/drvs/07/vg6708dqasnpwy2555ks8m6icrpn8h-gcc-cross-sans-libc-x86_64-w64-mingw32-11.3.0.drv.gz'.

cannot build derivation

`/gnu/store/z0lgdcw0h7v8d6vjvyb63lpivqlfprvg-profile.drv': 1

dependencies couldn't be built

guix shell: error: build of

`/gnu/store/z0lgdcw0h7v8d6vjvyb63lpivqlfprvg-profile.drv' failed

cat /var/log/guix/drvs/07/vg6708dqasnpwy2555ks8m6icrpn8h-gcc-cross-sans-libc-x86_64-w64-mingw32-11.3.0.drv

ice-9/read.scm:126:4: In procedure read-expr*:

/gnu/store/mam4l4yyzks9jxsa60bcd124am81r3f9-gcc-cross-sans-libc-x86_64-w64-mingw32-11.3.0-builder:1:6398:

Unknown # object: "#<"