This follows up commit d5b5a15a4046362377f1a45d466b43bb6e93d4f which doesn't
work because %current-system etc expands before the actual build.
Fixes <https://bugs.gnu.org/31719>.
* guix/build-system/meson.scm (meson-build)[builder]: Compare against the
already existing "system" variable rather than (%current-system).
This requires adding (guix utils) to the build inputs, and causes too many
rebuilds for now.
This reverts commit 24a2e9172a2d8970d57865c6130f2184385183a3.
* guix/build-system/meson.scm (lower): Remove DEFAULT-PATCHELF from inputs
on armhf.
(meson-build): Ignore the 'fix-runpath' phase when building for arm systems.
