Release Notes

Enhancements

• Add aliases for build backend requests (#9294)
• Avoid displaying empty paths (#9312)
• Allow constraints in uv tool upgrade (#9375)
• Remove conflict between --no-sync and --frozen in uv run (#9400)
• Respect dependency sources in overrides and constraints (#9455)
• Show an interpreter-focused message for --target and --prefix (#9373)
• Add --no-extra flag and setting (#9387)
• Add uv export --prune (#9389)
• Add dedicated error message for musl install attempts (#9430)
• Add various grammar changes to conflict error messages (#9369)
• Annotate default groups in conflict error messages (#9368)
• Report marker diagnostics during parsing, rather than evaluation (#9338)
• Use consistent formatting for build system errors (#9340)
• Use rich diagnostics for build failures (#9335)

Preview features

• Improve build backend excludes (#9281)
• Include PEP 639 license-files metadata during uv publish (#9442)

Performance

• Initialize rayon lazily (#9435)
• Migrate to PubGrub's arena for package names (#9448)

Bug fixes

• Allow dependency groups to include the containing package (#9385)
• Allow syncing to empty virtual environment directories (#9427)
• Allow system Python discovery with --target and --prefix (#9371)
• Don't warn when --output-file is empty (#9417)
• Fix Python interpreter discovery on non-glibc hosts (#9005)
• Fix tool.uv.dependency-metadata.[].version schema (#9468)
• Only respect preferences across the same indexes (#9302)
• Re-compile when --compile is passed to an install operation (#9378)
• Remove --upgrade, --no-upgrade, and --upgrade-package from uv tool upgrade (#9318)
• Remove dev dependencies in --all-groups --no-dev (#9300)
• Surface extras and group conflicts in uv export (#9365)
• Treat deprecated aliases as equivalent in marker algebra (#9342)
• Treat less compatible tags as lower priority in resolver (#9339)

Documentation

• Avoid referencing scikit-build (instead of scikit-build-core) (#9320)
• Expand entry points documentation (#9329)
• Fix example pyproject.toml in project concept documentation (#9298)
• Fix header level of "Conflicting dependencies" page (#9330)
• Touch-up the extension module guide (#9293)
• Update the dependencies documentation (#9359)
• Reference --no-progress option in related environment variable (#9357)

Install uv 0.5.5

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/uv/releases/download/0.5.5/uv-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy ByPass -c "irm https://github.com/astral-sh/uv/releases/download/0.5.5/uv-installer.ps1 | iex"

Download uv 0.5.5