When generating SBOM for foreign architectures (e.g., arm64), some Python packages fail to build. One such example is python3-cyclonedx-python-lib. During arm64 builds it throws the below error:

| The following packages have unmet dependencies:
| sbuild-build-depends-main-dummy:arm64 : Depends: dh-python:arm64
| Depends: python3-all:arm64 but it is not going to be installed
| Depends: python3-setuptools:arm64
| Depends: pybuild-plugin-pyproject:arm64

| Depends: python3-hatchling:arm64 but it is not installable

The fix is to add the :native suffix for Python build dependencies. For example:

DEBIAN_BUILD_DEPENDS = "debhelper (>= 11~), \
dh-python, \
python3-all:native, \
python3-setuptools, \
pybuild-plugin-pyproject, \
python3-poetry:native, \
python3-py-serializable:native, \
python3-packageurl-python:native, \
python3-sortedcontainers, \
python3-ddt:native, \
python3-defusedxml:native, \
python3-license-expression:native, \
python3-jsonschema:native, \
python3-lxml:native, \
"

In short, Python recipes required for the build must explicitly use the :native suffix to avoid cross-architecture dependency resolution issues.

On Friday, September 12, 2025 at 1:47:13 PM UTC+5:30 Srinuvasan Arjunan wrote:

Hi Steiger,

In this patch series, the first patch (meta: package Python dependencies for SBOM generation) does not work on foreign architectures. I have fixed those cross-build issues — shall I send a v2 of this patch in the series?

Many thanks,
Srinu

On Thursday, September 11, 2025 at 6:31:54 PM UTC+5:30 srinuv...@siemens.com wrote:
From: srinuvasan <srinuv...@siemens.com>

Includes additional fixes alongside the following patch series
https://groups.google.com/g/isar-users/c/4JntAI3gL1s

srinuvasan (1):
meta: derive ROOTFS_DISTRO correctly in sbom-chroot's
do_prepare_rootfs

meta/recipes-devtools/sbom-chroot/sbom-chroot.bb | 5 -----
1 file changed, 5 deletions(-)

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2.39.5