Fail to fetch packages for non-host architecture
Metadata
Current evaluation
Cross-arch stage-packages fetch fails for ros-jazzy-ros-base:arm64. Maintainer and reporter traced it to ROS 2 repo deps marked Architecture: All, i.e. likely upstream, not snapcraft. Triaged as a question (SNAPCRAFT-1026) with no resolution since Apr 2025.
Suggested action: keep open
Reason: The issue is triaged: labelled 'Type: Question', acknowledged by mr-cal, who spot-checked the ROS 2 packages and found them all marked 'All' while the reporter then conceded 'I think the issue lies with the ROS2 package repo and not snapcraft'. An internal ticket SNAPCRAFT-1026 was created and mr-cal asked for a working comparison environment, but the reporter could not produce one and no maintainer conclusion was ever posted, so the residual question — whether craft-parts should handle architecture-independent (:all) dependencies during cross-arch fetching — remains unanswered. The reporting case is likely upstream, but the general cross-arch behaviour is a real, recurring class of problem, so the issue should stay open for a maintainer decision rather than be closed.
Evaluated by: mr-cal-bot
Impact:
30
Quick Win:
8
Complexity:
50
Confidence:
66
Actionability:
50
Issue body
### Bug Description
Snapcraft fails to fetch packages from remote repositories with architectures different than the hosts, giving error:
```
Stage package not found in part 'foo': ros-jazzy-ros-base:arm64.
```
This is despite `ros-jazzy-ros-base:arm64` being present in a known repo. When running natively on either ARM64 or AMD64 (without `platform` key in yaml), all dependencies are pulled as expected and the build succeeds.
### To Reproduce
Simply run snapcraft on the `snapcraft.yaml` file.
### Environment
Ubuntu 24.04.2 LTS
snapcraft 8.7.4.post91 (tracking latest/edge)
LXD rev 33110 (5.21/stable)
### snapcraft.yaml
```yaml
name: foo
version: '0.0.0'
summary: foo
description: foo
grade: devel
confinement: devmode
base: core24
lint:
ignore:
- library
- classic
platforms:
arm64:
build-on: [amd64]
build-for: [arm64]
package-repositories:
- type: apt
architectures: [$CRAFT_ARCH_BUILD_FOR]
formats: [deb, deb-src]
components: [main, universe]
suites: [noble, noble-updates, noble-backports]
key-id: F6ECB3762474EDA9D21B7022871920D1991BC93C
url: http://ports.ubuntu.com/ubuntu-ports
- type: apt
architectures: [$CRAFT_ARCH_BUILD_FOR]
formats: [deb, deb-src]
components: [main]
suites: [noble]
key-id: C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654
url: http://repo.ros2.org/ubuntu/main
parts:
foo:
plugin: nil
source: .
stage-packages:
- libc6:$CRAFT_ARCH_BUILD_FOR
- ros-jazzy-ros-base:$CRAFT_ARCH_BUILD_FOR
```
### Relevant log output
```shell
:: 2025-04-16 08:43:37.275 Pulling foo
:: 2025-04-16 08:43:37.276 execute action foo:Action(part_name='foo', step=Step.PULL, action_type=ActionType.RUN, reason=None, project_vars=None, properties=ActionProperties(changed_files=None, changed_dirs=None))
:: 2025-04-16 08:43:37.276 Fetching stage-packages
:: 2025-04-16 08:43:37.276 Requested stage-packages: ['libc6:arm64', 'ros-jazzy-ros-base:arm64']
:: 2025-04-16 08:43:39.079 Marking libc6:arm64 (and its dependencies) to be fetched
:: 2025-04-16 08:43:39.079 package: libc6:arm64
:: 2025-04-16 08:43:39.201 Marking ros-jazzy-ros-base:arm64 (and its dependencies) to be fetched
:: 2025-04-16 08:43:39.201 package: ros-jazzy-ros-base:arm64
:: 2025-04-16 08:43:39.347 Stage package not found in part 'foo': ros-jazzy-ros-base:arm64.
:: 2025-04-16 08:43:39.350 Traceback (most recent call last):
:: 2025-04-16 08:43:39.350 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/executor/part_handler.py", line 949, in _fetch_stage_packages
:: 2025-04-16 08:43:39.350 fetched_packages = packages.Repository.fetch_stage_packages(
:: 2025-04-16 08:43:39.350 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
:: 2025-04-16 08:43:39.350 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/packages/deb.py", line 638, in fetch_stage_packages
:: 2025-04-16 08:43:39.350 return cls._fetch_stage_debs( # type: ignore[no-any-return]
:: 2025-04-16 08:43:39.350 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
:: 2025-04-16 08:43:39.350 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/packages/deb.py", line 293, in wrapped
:: 2025-04-16 08:43:39.350 return method(*args, **kwargs)
:: 2025-04-16 08:43:39.350 ^^^^^^^^^^^^^^^^^^^^^^^
:: 2025-04-16 08:43:39.350 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/packages/deb.py", line 685, in _fetch_stage_debs
:: 2025-04-16 08:43:39.350 apt_cache.mark_packages(set(package_names))
:: 2025-04-16 08:43:39.350 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/packages/apt_cache.py", line 328, in mark_packages
:: 2025-04-16 08:43:39.350 _verify_marked_install(package)
:: 2025-04-16 08:43:39.350 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/packages/apt_cache.py", line 375, in _verify_marked_install
:: 2025-04-16 08:43:39.350 raise errors.PackageNotFound(package.name)
:: 2025-04-16 08:43:39.350 craft_parts.packages.errors.PackageNotFound: Package not found: ros-jazzy-ros-base:arm64.
:: 2025-04-16 08:43:39.351
:: 2025-04-16 08:43:39.351 The above exception was the direct cause of the following exception:
:: 2025-04-16 08:43:39.351 Traceback (most recent call last):
:: 2025-04-16 08:43:39.351 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_application/services/lifecycle.py", line 302, in run
:: 2025-04-16 08:43:39.351 aex.execute(action, stdout=stream, stderr=stream)
:: 2025-04-16 08:43:39.351 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/executor/executor.py", line 324, in execute
:: 2025-04-16 08:43:39.351 self._executor.execute(actions, stdout=stdout, stderr=stderr)
:: 2025-04-16 08:43:39.351 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/executor/executor.py", line 136, in execute
:: 2025-04-16 08:43:39.351 self._run_action(act, stdout=stdout, stderr=stderr)
:: 2025-04-16 08:43:39.351 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/executor/executor.py", line 211, in _run_action
:: 2025-04-16 08:43:39.351 handler.run_action(action, stdout=stdout, stderr=stderr)
:: 2025-04-16 08:43:39.351 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/executor/part_handler.py", line 202, in run_action
:: 2025-04-16 08:43:39.351 state = handler(step_info, stdout=stdout, stderr=stderr)
:: 2025-04-16 08:43:39.351 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
:: 2025-04-16 08:43:39.351 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/executor/part_handler.py", line 224, in _run_pull
:: 2025-04-16 08:43:39.351 fetched_packages = self._fetch_stage_packages(step_info=step_info)
:: 2025-04-16 08:43:39.351 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
:: 2025-04-16 08:43:39.351 File "/snap/snapcraft/14286/lib/python3.12/site-packages/craft_parts/executor/part_handler.py", line 957, in _fetch_stage_packages
:: 2025-04-16 08:43:39.351 raise errors.StagePackageNotFound(
:: 2025-04-16 08:43:39.351 craft_parts.errors.StagePackageNotFound: Stage package not found in part 'foo': ros-jazzy-ros-base:arm64.
```
### Additional context
_No response_
Evaluation history
| Date | Model | Scores | Action | Summary |
|---|---|---|---|---|
| stealth/space-bunny-alpha |
Impact:
30
Quick Win:
8
Complexity:
50
Confidence:
66
Actionability:
50
|
keep open | Cross-arch stage-packages fetch fails for ros-jazzy-ros-base:arm64. Maintainer and reporter traced it to ROS 2 repo deps marked Architecture: All, i.e. likely upstream, not snapcraft. Triaged as a question (SNAPCRAFT-1026) with no resolution since Apr 2025. | |
| qwen/qwen3.6-35b-a3b |
Impact:
70
Quick Win:
20
Complexity:
65
Confidence:
75
Actionability:
80
|
keep open | Snapcraft fails to fetch cross-architecture stage-packages when dependencies include architecture-independent packages (:all). Maintainer identified root cause; issue is under investigation. | |
| qwen/qwen3.8-27b |
Impact:
40
Quick Win:
12
Staleness:
55
Complexity:
70
Confidence:
55
Support Request:
30
|
keep open | Cross-compile (amd64 build-on, arm64 build-for) fails to fetch stage-packages with :arm64 suffix (e.g. ros-jazzy-ros-base) even though present in repo; maintainer reproduced apt unmet-deps on arch-All python deps; reporter suspects ROS2 repo, not snapcraft. Awaiting reporter's working dpkg repro. | |
| qwen/qwen3.6-35b-a3b |
Staleness:
95
Complexity:
65
Confidence:
85
Support Request:
40
|
close stale | Snapcraft fails to fetch arm64 stage packages during amd64 builds. Maintainer requested a reproducible environment; reporter could not provide one and suspects upstream ROS2 repo. Inactive for over a year. | |
| qwen3.6-35b-a3b-mtp-q6 |
Staleness:
95
Complexity:
60
Confidence:
75
Support Request:
20
|
close stale | Snapcraft fails to fetch cross-architecture stage packages due to dependency resolution issues. Maintainer requested a reproducible environment, but the reporter could not provide one and suspects an upstream ROS2 repository problem. Issue has been inactive for over a year. |
Update history
No update history recorded yet.
Related work
-
Related To:
snapcraft (launchpad)#1827067
(confidence 72%)
Launchpad bug 'need a way to add foreign architecture to sources.list for build-packages/stage-packages' covers the same unresolved foreign-architecture package fetching problem, with a 2023 core22 reproducer still open.
-
Related To:
craft-parts#258
(confidence 65%)
Merged craft-parts change that made stage-packages fetch from the host architecture's repo; the relevant fetching logic (apt_cache._populate_stage_cache_dir, which only sets APT::Architecture and never adds the target arch as a foreign architecture) still lives in craft-parts, not this repo.
Related issues
No related issues found above the similarity threshold.