astral-sh/uv 0.13.1

on GitHub

Release Notes

Released on 2026-10-14.

Enhancements

• Ignore Requires-Python upper bounds in uv pip check and uv pip install --strict, consistent with resolution (#22500)
• Support Linux SPARC by falling back when filesystem cloning and detailed cache accounting are unavailable (#22463)
• Report missing trusted hashes in resolution errors (#22241)

Python

• Add CPython 3.16.0a1 (#22527)

Preview features

• Allow uv tool upgrade to upgrade installed tools when tool-install-locks is enabled (#22498)
• Add preliminary support for parsing PEP 825 variant labels in wheel filenames with wheel-variants (#22039)

Performance

• Reduce uv's binary size (#22429, #22430, #22432)
• Speed up Simple API parsing (#22429)
• Reduce package metadata parsing overhead (#22239)

Bug fixes

• Prevent tool and managed Python uninstalls from deleting unrelated files beside their storage directories (#22495)
• Restore support for source distributions containing hard links or full-length tar user or group names (#22516, #22522)
• Preserve device files and FIFOs used as uv pip compile or uv export output destinations (#22496)
• Fix sys._base_executable detection for environments created from symlinked interpreters (#22520)
• Prevent concurrent readers from observing partially written lockfiles, Python version files, or managed Python sysconfig files (#22399, #22402, #22403)
• Serialize concurrent project commands that reach the same environment through real and symlinked paths (#22390)
• Prevent installs, syncs, and environment creation from failing when they race with uv cache clean (#22387)
• Prevent concurrent tool installations from corrupting an environment when the last tool is uninstalled (#22391)
• Persist changed upgrade settings even when uv tool upgrade leaves the tool version unchanged (#22499)
• Reuse environments with installed Git dependencies pinned to full commit hashes without resolving again (#22464)

Documentation

• Explain how to select an emulated Python interpreter on Windows ARM64 when native wheels are unavailable (#22424)
• Fix the .netrc format documentation link (#22514)

Other changes

• Publish Python 3.15-based uv Docker images under stable tags (#22503)

Install uv 0.13.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/uv/releases/download/0.13.1/uv-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/uv/releases/download/0.13.1/uv-installer.ps1 | iex"

Download uv 0.13.1

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo astral-sh/uv

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>