Can't update repositories when building for different arch from host
Metadata
Current evaluation
Cross-arch apt sources picked archive.ubuntu.com instead of ports.ubuntu.com; fixed on the snapcraft side by canonical/craft-archives#96 and snapcore/snapcraft#4303 (commit 1db0f39), released in 7.5.1/7.5.2; reporter confirmed resolved.
Resolution: closed resolved
Reason: Maintainer @mr-cal pointed to canonical/craft-archives#96 and snapcore/snapcraft#4303, shipped in snapcraft 7.5.1 (confirmed working on 7.5.2 by the reporter, who later cited commit 1db0f397b49c95800ac606a9f06b2179170fcd51). The upstream Launchpad/dpkg side of the bug (dpkg --add-architecture breaking apt update) remained open separately.
Evaluated by: mr-cal-bot
No scores available.
Issue body
Rnning `snapcraft --use-lxd --build-for=arm64` fails at the package repository update step. Currently (snapcraft rev. 9121) `dpkg` will be used to add a new architecture (when building either in destructive mode or in LXD). For whatever reason, when `apt update` is run the incorrect URL is used for the new architecture (it points to archive.ubuntu.com instead of ports.ubuntu.com).
A simple resolution I've found is making the deb sources in `/etc/apt/sources.list` more explicit by adding `[arch=amd64]` to each line.
Considering snapcraft already modifies the image by running updates and adding foreign architectures, it seems reasonable to at least make the repositories the image uses a bit more explicit architecture-wise.
The particular lines in question where I think this happens:
https://github.com/canonical/craft-archives/blob/cc4a9346eee627948d76ade16041f96b4ad70ff1/craft_archives/repo/apt_sources_manager.py#L220-L224
Evaluation history
| Date | Model | Scores | Action | Summary |
|---|---|---|---|---|
| stealth/space-bunny-alpha | — | closed resolved | Cross-arch apt sources picked archive.ubuntu.com instead of ports.ubuntu.com; fixed on the snapcraft side by canonical/craft-archives#96 and snapcore/snapcraft#4303 (commit 1db0f39), released in 7.5.1/7.5.2; reporter confirmed resolved. | |
| stealth/space-bunny-alpha | — | closed resolved | Fixed by canonical/craft-archives#96 (commit 06b1ca2), which added explicit arch qualifiers to generated apt sources and only adds compatible target architectures; pulled in via snapcore/snapcraft#4303 (commit 1db0f397), shipped in snapcraft 7.5.1. | |
| stealth/space-bunny-alpha | — | closed stale | Cross-architecture apt source selection failed for ARM64 builds, but matching Launchpad bug #2018609 was closed without a documented fix or linked resolution. | |
| qwen/qwen3.6-35b-a3b | — | — | Closed without resolution. The cross-architecture apt repository URL mismatch in snapcraft was not fixed, indicating the report was abandoned or superseded by upstream changes. | |
| qwen/qwen3.6-35b-a3b | — | — | Cross-architecture repository update bug in snapcraft was closed without discussion or a fix. The report appears abandoned, with no resolution or pull request provided. | |
| qwen/qwen3.6-35b-a3b | — | — | Closed without resolution. Cross-architecture builds failed during apt updates due to incorrect Ubuntu archive URLs. The issue was abandoned without a fix or merge. | |
| qwen3.6-35b-a3b-mtp-q6 | — | — | Cross-architecture apt update failures during snapcraft builds were closed without resolution. The proposed sources.list architecture tagging fix was not implemented, leaving the bug abandoned. |
Update history
| Date | Change |
|---|---|
| created |
Related work
-
Likely Fixed By:
canonical/craft-archives#96
(confidence 95%)
craft-archives PR cited by the maintainer as the core fix making apt sources list architecture explicitly
-
Likely Fixed By:
snapcore/snapcraft#4303
(confidence 95%)
snapcraft-side change by tigarmo paired with craft-archives#96; released in 7.5.1
-
Duplicate Of:
snapcraft (launchpad)#2009278
(confidence 85%)
Bug 2009278 was identified by the maintainer and reporter as the same root cause (issue1 reported there)
-
Related To:
snapcore/snapcraft@1db0f397b49c95800ac606a9f06b2179170fcd51
(confidence 80%)
Commit cited by the reporter as the full resolution
Related issues
| Issue | Project | State | Summary | Similarity |
|---|---|---|---|---|
| #2009278 Can't mix ports.ubuntu.com and archive.ubuntu.com (building multi-arch snaps) | snapcraft (launchpad) | closed | Resolved in Snapcraft 7.5.2 by globally adding only compatible foreign architectures (amd64+i386, arm64+armhf); the reporter confirmed package-repository refresh now works. | |
| #6326 core26: apt update fails due to armhf being added to the architectures list on arm64 platforms | snapcraft | closed | core26 arm64 builds failed because craft-archives auto-added armhf, 404ing on archive.ubuntu.com. Root cause fixed in craft-archives#255 (commit b4767b8, v2.2.2); snapcraft pinned craft-archives>=2.2.2 via merged PR #6415. | |
| #4224 Regression: snapcraft started failing with craft_archives.repo.errors.AptGPGKeyInstallError | snapcraft | closed | Multi-key APT GPG parsing regression was fixed by merged PR #4253 (a311e7c), updating craft-archives and shipping in the Snapcraft 7.4.4 hotfix. |