0.6.6

Release Notes

Python

• Add support for dynamic musl Python distributions on x86-64 Linux (#12121)
• Allow the experimental JIT to be enabled at runtime on Python 3.13 and 3.14 on Linux
• Upgrade the build toolchain to LLVM 20, improving performance

See the python-build-standalone release notes for more details.

Enhancements

• Add --marker flag to uv add (#12012)
• Allow overriding module name for uv build backend (#11884)
• Sync latest Python releases (#12120)
• Use 'Upload' instead of 'Download' in publish reporter (#12029)
• Add [index].authenticate allowing authentication to be required on an index (#11896)
• Add support for Windows legacy scripts in uv tool run (#12079)
• Propagate conflicting dependency groups when using include-group (#12005)
• Show ambiguous requirements when uv add failed (#12106)

Performance

• Cache workspace discovery (#12096)
• Insert dependencies into fork state prior to fetching metadata (#12057)
• Remove some allocations from uv-auth (#12077)

Bug fixes

• Avoid considering PATH updated when the export is commented in the shellrc (#12043)
• Fix uv publish retry on network failures (#12041)
• Use a sized stream in uv publish to comply with WSGI PyPI server constraints (#12111)
• Fix uv python install --reinstall when the version was not previously installed (#12124)

Preview features

• Fix uv_build invocation (#12058)

Documentation

• Quote versions string in python-versions.md (#12112)
• Fix tool concept page headings (#12053)
• Update the [index].authenticate docs (#12102)
• Update versioning policy (#11666)

uv 0.6.6

Install uv 0.6.6

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/uv/releases/download/0.6.6/uv-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://github.com/astral-sh/uv/releases/download/0.6.6/uv-installer.ps1 | iex"

Download uv 0.6.6

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-powerpc64-unknown-linux-gnu.tar.gz	PPC64 Linux	checksum
uv-powerpc64le-unknown-linux-gnu.tar.gz	PPC64LE 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-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

uv-build 0.6.6

Install uv-build 0.6.6

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/uv/releases/download/0.6.6/uv-build-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://github.com/astral-sh/uv/releases/download/0.6.6/uv-build-installer.ps1 | iex"

Download uv-build 0.6.6

File	Platform	Checksum
uv-build-aarch64-apple-darwin.tar.gz	Apple Silicon macOS	checksum
uv-build-x86_64-apple-darwin.tar.gz	Intel macOS	checksum
uv-build-aarch64-pc-windows-msvc.zip	ARM64 Windows	checksum
uv-build-i686-pc-windows-msvc.zip	x86 Windows	checksum
uv-build-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
uv-build-aarch64-unknown-linux-gnu.tar.gz	ARM64 Linux	checksum
uv-build-i686-unknown-linux-gnu.tar.gz	x86 Linux	checksum
uv-build-powerpc64-unknown-linux-gnu.tar.gz	PPC64 Linux	checksum
uv-build-powerpc64le-unknown-linux-gnu.tar.gz	PPC64LE Linux	checksum
uv-build-s390x-unknown-linux-gnu.tar.gz	S390x Linux	checksum
uv-build-x86_64-unknown-linux-gnu.tar.gz	x64 Linux	checksum
uv-build-armv7-unknown-linux-gnueabihf.tar.gz	ARMv7 Linux	checksum
uv-build-aarch64-unknown-linux-musl.tar.gz	ARM64 MUSL Linux	checksum
uv-build-i686-unknown-linux-musl.tar.gz	x86 MUSL Linux	checksum
uv-build-x86_64-unknown-linux-musl.tar.gz	x64 MUSL Linux	checksum
uv-build-arm-unknown-linux-musleabihf.tar.gz	ARMv6 MUSL Linux (Hardfloat)	checksum
uv-build-armv7-unknown-linux-musleabihf.tar.gz	ARMv7 MUSL Linux	checksum