0.12.11

Release Notes

Released on 2026-09-08.

Preview features

• Generate missing artifact hashes when exporting pylock.toml files to ensure they conform to PEP 751 (#20146)
• Warn when pylock.toml artifact hash tables are empty, which will be rejected in a future uv release (#21462)

Performance

• Speed up installs that overwrite existing files by eliminating per-file temporary directories for atomic hard-link, symlink, and reflink replacements (#21478)
• Speed up installs that merge copied wheels into existing environments by replacing per-file temporary directories with adjacent temporary files (#21468)
• Speed up local wheel installs by replacing the shared ZIP cursor lock with positioned reads (#21500)
• Speed up local wheel installs by reusing ZIP readers and buffers across extracted files (#21499)
• Avoid transitive dependency checks and unnecessary resolution when uv pip install --no-deps finds the requested packages already installed (#21523)

Bug fixes

• Verify source archives against hashes recorded in uv.lock before reading their metadata or running their build backends (#21223)
• Verify supplied hashes for registry requirements pinned with === under both --verify-hashes and --require-hashes (#21543)
• Apply hashes from public-version pins to matching local versions when no exact local-version hash is provided (#21544)
• Support PowerShell virtual environment activation from UNC paths, including WSL paths (#19159)
• Trim surrounding whitespace from entries in .python-version and .python-versions files (#21529)
• Suppress VIRTUAL_ENV mismatch warnings for uv add --no-sync, uv remove --no-sync, and uv add --frozen (#21496)
• Warn and continue when uv python list cannot query an interpreter (#21498)

Documentation

• Restore TOML syntax highlighting for exclude-newer examples (#21534)

Install uv 0.12.11

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/uv/releases/download/0.12.11/uv-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/uv/releases/download/0.12.11/uv-installer.ps1 | iex"

Download uv 0.12.11

File	Platform	Checksum
uv-aarch64-apple-darwin.tar.gz	Apple Silicon macOS	checksum
uv-x86_64-apple-darwin.tar.gz	Intel macOS	checksum
uv-aarch64-pc-windows-msvc.zip	ARM64 Windows	checksum
uv-i686-pc-windows-msvc.zip	x86 Windows	checksum
uv-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
uv-aarch64-unknown-linux-gnu.tar.gz	ARM64 Linux	checksum
uv-i686-unknown-linux-gnu.tar.gz	x86 Linux	checksum
uv-powerpc64le-unknown-linux-gnu.tar.gz	PPC64LE Linux	checksum
uv-riscv64gc-unknown-linux-gnu.tar.gz	RISCV Linux	checksum
uv-s390x-unknown-linux-gnu.tar.gz	S390x Linux	checksum
uv-x86_64-unknown-linux-gnu.tar.gz	x64 Linux	checksum
uv-armv7-unknown-linux-gnueabihf.tar.gz	ARMv7 Linux	checksum
uv-aarch64-unknown-linux-musl.tar.gz	ARM64 MUSL Linux	checksum
uv-i686-unknown-linux-musl.tar.gz	x86 MUSL Linux	checksum
uv-riscv64gc-unknown-linux-musl.tar.gz	RISCV MUSL Linux	checksum
uv-x86_64-unknown-linux-musl.tar.gz	x64 MUSL Linux	checksum
uv-arm-unknown-linux-musleabihf.tar.gz	ARMv6 MUSL Linux (Hardfloat)	checksum
uv-armv7-unknown-linux-musleabihf.tar.gz	ARMv7 MUSL Linux	checksum

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>