0.12.21
astral-sh/uv0.12.21Sep 29, 2026by astral-releases-bot[bot]
Upgrading?
AI Summary
Updates CPython to use OpenSSL 3.5.9 and improves lockfile cleanliness by omitting empty sections and redundant constraints.
Key Highlights
- Update CPython to use OpenSSL 3.5.9
- Omit empty `[manifest]` tables from lockfiles that contain only manifest subtables
- Preview feature to omit redundant runtime constraints from `uv.lock`
- Fix `uv python pin --rm` to not remove global `.python-versions` without `--global`
New Features
- Omit redundant runtime constraints from `uv.lock`, including those involving pre-releases, with the `resolution-inputs` preview feature
- Omit empty `[manifest]` tables from lockfiles that contain only manifest subtables
Full Release Notes
## Release Notes Released on 2026-09-29. ### Python - Update CPython to use OpenSSL 3.5.9 ([#22076](https://github.com/astral-sh/uv/pull/22076)) ### Enhancements - Omit empty `[manifest]` tables from lockfiles that contain only manifest subtables ([#22070](https://github.com/astral-sh/uv/pull/22070)) ### Preview features - Omit redundant runtime constraints from `uv.lock`, including those involving pre-releases, with the `resolution-inputs` preview feature ([#22004](https://github.com/astral-sh/uv/pull/22004), [#22068](https://github.com/astral-sh/uv/pull/22068)) ### Bug fixes - Prevent `uv python pin --rm` from removing a global `.python-versions` file without `--global` ([#21992](https://github.com/astral-sh/uv/pull/21992)) - Fix installed-package checks incorrectly reporting post-releases as incompatible with exclusive lower bounds on pre-releases ([#22049](https://github.com/astral-sh/uv/pull/22049)) ## Install uv 0.12.21 ### Install prebuilt binaries via shell script ```sh curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-installer.sh | sh ``` ### Install prebuilt binaries via powershell script ```sh powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-installer.ps1 | iex" ``` ## Download uv 0.12.21 | File | Platform | Checksum | |--------|----------|----------| | [uv-aarch64-apple-darwin.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-aarch64-apple-darwin.tar.gz) | Apple Silicon macOS | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-aarch64-apple-darwin.tar.gz.sha256) | | [uv-x86_64-apple-darwin.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-x86_64-apple-darwin.tar.gz) | Intel macOS | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-x86_64-apple-darwin.tar.gz.sha256) | | [uv-aarch64-pc-windows-msvc.zip](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-aarch64-pc-windows-msvc.zip) | ARM64 Windows | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-aarch64-pc-windows-msvc.zip.sha256) | | [uv-i686-pc-windows-msvc.zip](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-i686-pc-windows-msvc.zip) | x86 Windows | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-i686-pc-windows-msvc.zip.sha256) | | [uv-x86_64-pc-windows-msvc.zip](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-x86_64-pc-windows-msvc.zip) | x64 Windows | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-x86_64-pc-windows-msvc.zip.sha256) | | [uv-aarch64-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-aarch64-unknown-linux-gnu.tar.gz) | ARM64 Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-aarch64-unknown-linux-gnu.tar.gz.sha256) | | [uv-i686-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-i686-unknown-linux-gnu.tar.gz) | x86 Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-i686-unknown-linux-gnu.tar.gz.sha256) | | [uv-powerpc64le-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-powerpc64le-unknown-linux-gnu.tar.gz) | PPC64LE Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-powerpc64le-unknown-linux-gnu.tar.gz.sha256) | | [uv-riscv64gc-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-riscv64gc-unknown-linux-gnu.tar.gz) | RISCV Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-riscv64gc-unknown-linux-gnu.tar.gz.sha256) | | [uv-s390x-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-s390x-unknown-linux-gnu.tar.gz) | S390x Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-s390x-unknown-linux-gnu.tar.gz.sha256) | | [uv-x86_64-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-x86_64-unknown-linux-gnu.tar.gz) | x64 Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-x86_64-unknown-linux-gnu.tar.gz.sha256) | | [uv-armv7-unknown-linux-gnueabihf.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-armv7-unknown-linux-gnueabihf.tar.gz) | ARMv7 Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-armv7-unknown-linux-gnueabihf.tar.gz.sha256) | | [uv-aarch64-unknown-linux-musl.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-aarch64-unknown-linux-musl.tar.gz) | ARM64 MUSL Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-aarch64-unknown-linux-musl.tar.gz.sha256) | | [uv-i686-unknown-linux-musl.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-i686-unknown-linux-musl.tar.gz) | x86 MUSL Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-i686-unknown-linux-musl.tar.gz.sha256) | | [uv-riscv64gc-unknown-linux-musl.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-riscv64gc-unknown-linux-musl.tar.gz) | RISCV MUSL Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-riscv64gc-unknown-linux-musl.tar.gz.sha256) | | [uv-x86_64-unknown-linux-musl.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-x86_64-unknown-linux-musl.tar.gz) | x64 MUSL Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-x86_64-unknown-linux-musl.tar.gz.sha256) | | [uv-arm-unknown-linux-musleabihf.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-arm-unknown-linux-musleabihf.tar.gz) | ARMv6 MUSL Linux (Hardfloat) | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-arm-unknown-linux-musleabihf.tar.gz.sha256) | | [uv-armv7-unknown-linux-musleabihf.tar.gz](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-armv7-unknown-linux-musleabihf.tar.gz) | ARMv7 MUSL Linux | [checksum](https://releases.astral.sh/github/uv/releases/download/0.12.21/uv-armv7-unknown-linux-musleabihf.tar.gz.sha256) | ## 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](https://cli.github.com/manual/gh_attestation_verify): ```sh gh attestation verify <file-path of downloaded artifact> --repo astral-sh/uv ``` You can also download the attestation from [GitHub](https://github.com/astral-sh/uv/attestations) and verify against that directly: ```sh gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation> ```
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