Build cannot install already installed build-snap
Metadata
Current evaluation
Snapcraft 9 build aborts with SnapInstallError when a build-snap (mesa-2404) is already installed; traceback points to craft-parts snaps.py. Untriaged: no labels, no maintainer comments, no reproducer for 75 days.
Suggested action: needs triage
Reason: The report has zero comments, no labels and no assignee, so it has not been assessed by a maintainer. It is also unactionable as written: the reporter supplies only a traceback and no snapcraft.yaml, no build command, no `snap version`/`snapd` state, and not even the raw output of the failing `snap install mesa-2404` command, so the actual cause is unknown (plausible non-bug causes include no network/store access, confinement or content-interface conflicts, or revision mismatch rather than a snapcraft defect). Note the failing code is `craft_parts/packages/snaps.py` install/install_snaps, i.e. it lives in canonical/craft-parts, so ownership of the fix also needs to be determined before work starts.
Evaluated by: mr-cal-bot
Impact:
35
Quick Win:
5
Complexity:
50
Confidence:
72
Actionability:
28
Issue body
oHi,
While building a snap with build-snaps dependencies (or plugs or extension)
Dependencies that are already installed
Since Snapcraft9+ (may be not related)
I spent 80% of my day with an error:
"Error installing snap 'mesa-2404' from channel 'latest/stable'." or any other snap dependency
```
Installing build-snaps
Installing snap: gtk-common-themes
Installing snap: mesa-2404
Error installing snap 'mesa-2404' from channel 'latest/stable'.
Traceback (most recent call last):
File "/snap/snapcraft/18514/lib/python3.12/site-packages/craft_parts/packages/snaps.py", line 236, in install
subprocess.run(
File "/snap/snapcraft/current/usr/lib/python3.12/subprocess.py", line 571, in run
raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['snap', 'install', 'mesa-2404']' returned non-zero exit status 1.
:: 2026-07-19 13:34:22.253
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/snap/snapcraft/18514/lib/python3.12/site-packages/craft_application/services/lifecycle.py", line 355, in run
self._exec(actions)
File "/snap/snapcraft/18514/lib/python3.12/site-packages/craft_application/services/lifecycle.py", line 374, in _exec
with self._lcm.action_executor() as aex:
File "/snap/snapcraft/18514/lib/python3.12/site-packages/craft_parts/executor/executor.py", line 340, in __enter__
self._executor.prologue()
File "/snap/snapcraft/18514/lib/python3.12/site-packages/craft_parts/executor/executor.py", line 109, in prologue
self._install_build_snaps()
File "/snap/snapcraft/18514/lib/python3.12/site-packages/craft_parts/executor/executor.py", line 306, in _install_build_snaps
packages.snaps.install_snaps(build_snaps)
File "/snap/snapcraft/18514/lib/python3.12/site-packages/craft_parts/packages/snaps.py", line 304, in install_snaps
snap_pkg.install()
File "/snap/snapcraft/18514/lib/python3.12/site-packages/craft_parts/packages/snaps.py", line 243, in install
raise errors.SnapInstallError(
craft_parts.packages.errors.SnapInstallError: Error installing snap 'mesa-2404' from channel 'latest/stable'.
```
I really want to quit making snaps...
Thanks
Evaluation history
| Date | Model | Scores | Action | Summary |
|---|---|---|---|---|
| stealth/space-bunny-alpha |
Impact:
35
Quick Win:
5
Complexity:
50
Confidence:
72
Actionability:
28
|
needs triage | Snapcraft 9 build aborts with SnapInstallError when a build-snap (mesa-2404) is already installed; traceback points to craft-parts snaps.py. Untriaged: no labels, no maintainer comments, no reproducer for 75 days. | |
| stealth/space-bunny-alpha |
Impact:
57
Quick Win:
18
Complexity:
45
Confidence:
89
Actionability:
58
|
needs triage | Snapcraft 9 builds abort with SnapInstallError when an installed build dependency such as mesa-2404 is requested; the report has no maintainer triage or complete reproducer. | |
| qwen3.6-35b-a3b-mtp-q6 |
Impact:
60
Quick Win:
27
Staleness:
45
Complexity:
55
Confidence:
65
Support Request:
20
|
needs triage | Build fails when installing build-snap dependencies that are already present on the system. No maintainer response after 48 days. | |
| qwen/qwen3.6-35b-a3b |
Staleness:
10
Complexity:
40
Confidence:
95
Support Request:
10
|
needs triage | Snapcraft fails to install build-snap dependencies already present on the host, throwing a SnapInstallError during builds. Currently untriaged with no maintainer response. | |
| qwen/qwen3.6-35b-a3b |
Staleness:
10
Complexity:
40
Confidence:
85
Support Request:
30
|
needs triage | Build fails when installing build-snap dependencies that are already present. Error occurs in craft_parts during snap install step. No maintainer response yet. | |
| qwen3.6-35b-a3b-mtp-q6 |
Staleness:
5
Complexity:
40
Confidence:
85
Support Request:
10
|
needs triage | Build fails when snapcraft attempts to install build-snap dependencies that are already present on the host. No maintainer response yet. |
Update history
| Date | Change |
|---|---|
| created |
Related issues
| Issue | Project | State | Summary | Similarity |
|---|---|---|---|---|
| #2099923 Snapcraft builds are failing: install of snap "snapcraft" failed | snapcraft (launchpad) | open | Reported Launchpad Bionic non-i386 builds cannot install Snapcraft 7.x/stable because core20 needs snapd 2.61; the issue remains open, untriaged, and unanswered. |