# Prefect 3.8.4.dev5 — 3.8.4.dev5: Nightly Development Release

- Product: Prefect (https://whatsnew.fyi/product/prefect)
- Vendor: Prefect
- Date: 2026-08-21
- Version: 3.8.4.dev5
- Original notes: https://github.com/PrefectHQ/prefect/releases/tag/3.8.4.dev5
- Permalink: https://whatsnew.fyi/product/prefect/releases/3.8.4.dev5
- Labels: Pre-release

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Restore BigQuery dry-run job config flags when the dry run fails
- **fixed** — Add index on flow_run.deployment_id
- **fixed** — Fix lateness label on flow run cards in ui-v2
- **changed** — Bind-mount the sdist in client/Dockerfile so it stops shipping in the client image
- **changed** — Set SF_PARTNER in SPCS flow-run containers for Snowflake partner attribution
- **changed** — Fix stale Azure Container Instance examples

<!-- Release notes generated using configuration in .github/release.yml at main -->

##### What's Changed
###### Enhancements ➕➕
* Fix stale Azure Container Instance examples by @samrusani in https://github.com/PrefectHQ/prefect/pull/22830
###### Bug Fixes 🐞
* Restore BigQuery dry-run job config flags when the dry run fails by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22888
* Add index on flow_run.deployment_id by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22890
* Fix lateness label on flow run cards in ui-v2 by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22896
* docker: bind-mount the sdist in client/Dockerfile so it stops shipping in the client image by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22833
###### Development & Tidiness 🧹
* Deflake concurrency lease tests: wait for the API-visible slot release by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22884
* Fix flaky blocks E2E test: scope block cleanup to a single test by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22892
###### Documentation 📓
* Update Google Tag Manager ID in docs.json by @zzstoatzz in https://github.com/PrefectHQ/prefect/pull/22891
###### Uncategorized
* Fix flaky deployment detail e2e tests: scope details assertions to the sidebar by @devin-ai-integration[bot] in https://github.com/PrefectHQ/prefect/pull/22880
* docker: bind-mount the sdist so it stops shipping in the published image by @sujeito-operator in https://github.com/PrefectHQ/prefect/pull/22832
* Set SF_PARTNER in SPCS flow-run containers for Snowflake partner attribution by @bdalpe in https://github.com/PrefectHQ/prefect/pull/22881
* ci: pass the release ref through env in the prerelease tag check by @WAHIB-EL-KHADIRI in https://github.com/PrefectHQ/prefect/pull/22882
* chore(deps): Update python dev tooling by @prefect-renovate[bot] in https://github.com/PrefectHQ/prefect/pull/22779
* chore(deps): Update CodSpeedHQ/action action to v5 by @prefect-renovate[bot] in https://github.com/PrefectHQ/prefect/pull/22783
* chore(deps): Update dependency eslint-plugin-react-hooks to v7 by @prefect-renovate[bot] in https://github.com/PrefectHQ/prefect/pull/22788
* chore(deps): Update python dependencies by @prefect-renovate[bot] in https://github.com/PrefectHQ/prefect/pull/22778
* chore(deps): Update dependency zod to v4 by @prefect-renovate[bot] in https://github.com/PrefectHQ/prefect/pull/22795

##### New Contributors
* @samrusani made their first contribution in https://github.com/PrefectHQ/prefect/pull/22830
* @sujeito-operator made their first contribution in https://github.com/PrefectHQ/prefect/pull/22832
* @WAHIB-EL-KHADIRI made their first contribution in https://github.com/PrefectHQ/prefect/pull/22882

**Full Changelog**: https://github.com/PrefectHQ/prefect/compare/3.8.4.dev4...3.8.4.dev5