pixi 0.71.0

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release notes

## Release Notes
✨ Highlights
This release adds a lot of exciting features.
⚠️ Breaking: Configurable Conda to PyPI name mappings
Pixi now gives you more control over how conda packages are matched to PyPI packages.
Previously you could already have an external map, in a file that overwrote the mappings we generate with parselmouth
There were a couple of problems though:

It was alwys a full overwrite,
We write a single-file compressed mapping, but it was not usable directly in Pixi and needed to be modified.

Especially 2, limited people on corporate networks to host their own mappings. We've now made a bunch of improvements:
Workspace conda-pypi-map now supports per-channel configuration with:

inline mappings,
remote mapping files, local was already supported,
Direct support for linking to: https://github.com/prefix-dev/parselmouth/blob/main/files/compressed_mapping.json
overlay (new) vs replacement (old) behavior,
explicit opt-out for certain packages,
and finally control over the same-name heuristic. Meaning that in case of a fallback you can enable just taking the conda as the PyPI name.

This makes it easier to fix individual name mismatches, use private channel mappings, or run reliably in

offline and firewall-restricted environments.
And with remote mapping files specifically, you could host an accurate mapping on your own infrastructure by using the compressed mapping, no need to hit an external network.
[workspace.conda-pypi-map]
# Fix a few names while falling back to Pixi's default mapping.
conda-forge = { mapping = { pytorch = "torch", not-on-pypi = false } }

# Treat a custom mapping as the source of truth for a channel.
my-company = { location = "mapping.json", mapping-mode = "replace" }

# Disable PyPI name derivation for one channel.
internal = false
The Python build backend also gains pypi-conda-map, letting pixi-build-python override PyPI-to-conda

dependency mapping inline before consulting the mapping service:
[package.build.config]
ignore-pypi-mapping = false
pypi-conda-map = { torch = "pytorch", my-internal-pkg = false }
All in all, this is a breaking change, since bare mapping locations such as conda-forge = "mapping.json" are now additive overlays by default.

To restore the old source-of-truth behavior, use:
conda-forge = { location = "mapping.json", mapping-mode = "replace", same-name-heuristic = false }
conda-pypi-map = false now fully disables PyPI name derivation, including same-name guessing. The

legacy conda-pypi-map = {} behavior is still supported but deprecated; spell it explicitly as:
conda-pypi-map = { conda-forge = { mapping-mode = "replace" } }
Rich platforms
We deprecated [system-requirements] in favor of the much more expressive rich platform support.

On top of operating systems and processor architecture, platforms can now also include system requirements like CUDA or glibc version:
[workspace]
platforms = [
  "osx-arm64",
  { platform = "linux-64", cuda = "12.0", glibc = "2.28" },
  { name = "jetson-nano", platform = "linux-aarch64", cuda = "12.8" },
]
Speaking of CUDA, together with rich platforms we added support for __cuda_arch.

We already supported __cuda which allows specifying the driver version you require.

With __cuda_arch, you can specify the necessary hardware architecture.
v3 Repodata
We also added support for v3 repodata.

That means you can declare extra dependency groups:
[package.extra-dependencies.test]
hypothesis = "*"
pytest = ">=8"

[package.extra-dependencies.cuda]
cupy = ">=13"
And of course you can also consume them:
[dependencies]
mypackage = { path = "./mypackage", extras = ["test"] }
It also includes the when keyword:
[package.run-dependencies]
unix-helper = { version = "*", when = "__unix" }
And it allows to set flags:
[package.build]
backend = { name = "pixi-build-cmake", version = "0.*" }
# not required:
channels = ["https://prefix.dev/conda-forge"]
config = { key = "value" } # Optional configuration, specific to the build backend
flags = [
  "cuda",
  "blas_openblas",
] # Optional variant flags recorded in the package metadata
Note that while the conda-forge channel does not support v3 repodata just yet. You can start using it for your local (pixi build) source built packages.
Conditional dependencies
Finally, we revamped the way we define conditional dependencies.

We deprecated [package.target.*.host,build,run-dependencies] and introduce the following syntax:
# Only needed when cross-compiling (host platform differs from build platform).
[package.build-dependencies."if(host_platform != build_platform)"]
cross-python = "*"

# Only on Linux.
[package.host-dependencies."if(host_platform == 'linux-64')"]
libgl-devel = ">=1.7.0,<2"

# Based on a build variant.
[package.host-dependencies."if(matches(python, '>=3.10'))"]
exceptiongroup = "*"
NOTE: This only affects source dependencies, [target.*.dependencies] remains valid.
 Breaking changes

Make conda-pypi mappings configurable by @tdejager in #6333

Added

Rich Platform support by @hunger in #6178
Support extras, flags and when on conda dependencies by @Hofer-Julian in #6262
Do not run tests un unsupported platforms by @hunger in #6339
Support if(...) conditional package dependencies by @Hofer-Julian in #6269
Support wildcard platform target selectors by @hunger in #6301
pixi add skips already-present packages without version spec by @ruben-arts in #6352
Make package.build.backend.version optional by @Hofer-Julian in #6384
Add --no-pypi flag to conda-environment export by @baszalmstra in #6380
Derive c_stdlib build variants from system requirements by @hunger in #6320
Friendly __cuda_arch support by @hunger in #6408

Changed

Make test_info_output_extended platform-agnostic by @Hofer-Julian in #6314
Key locked records by declared platform for rich platforms by @hunger in #6315
Detect extra-dependency drift for source packages by @Hofer-Julian in #6263
Attest the tarballs and the binary inside separately by @hunger in #6266
Allow to re-order, do not sort in the one place that persisted by @hunger in #6346
Recommend 'pixi workspace platform add' in target help by @hunger in #6358
Do not fail when asked to install an environment with an unused requirement not used by @hunger in #6389
Resolve pre-v7 lockfiles for migrated platforms by @hunger
Use rust integration tests. by @hunger in #6375
Relock advanced_cpp doc example by @tdejager in #6403
Forward declared __cuda_arch to the solver by @hunger in #6404
Repair main CI failures by @tdejager in #6406

Documentation

Remove pixi-inject page by @pavelzw in #6276
Add a pixi-build v3 example using extras, flags and when by @Hofer-Julian in #6264
Mention code execution of pixi-build in security section by @pavelzw in #6361

Fixed

Move examples satisfiability tests to Python by @Hofer-Julian in #6300
Honor workspace [cache.*] overrides for conda-pypi mapping cache by @baszalmstra in #6284
Stop source builds rebuilding from scratch on every run by @baszalmstra in #6285
Suggest the correct cache config key in netfs-redirect warning by @baszalmstra in #6282
Skip example satisfiability checks on unsupported platforms by @tdejager in #6311
Skip pytorch doc examples on platforms they don't support by @hunger in #6317
Stop requiring old backend version doc example by @Hofer-Julian in #6338
Allow OCI channels by @baszalmstra in #6341
Move workspace variants build test under pixi_build by @hunger in #6345
Detect site-packages clobbering of conda packages by PyPI wheels by @tdejager in #6344
Refactor test for pixi workspaces by @ruben-arts in #6351
Removing environment updates lockfile by @ruben-arts in #6337
Derive used variants from conditional dependencies by @Hofer-Julian in #6354
Resolve initialization manifest bugs and restructure the init module by @samrosenf in #6294
Update stale detached environment and build symlinks by @kilian-hu in #6154
Anchor [tool.uv.sources] paths to workspace root in pixi.lock by @jevandezande in #6187
Stop adapting backend behaviour based on build/host dependencies by @Hofer-Julian in #6356
Verify PyPI lock file hashes during install by @tdejager in #6353
Set exclude-newer for pixi-build-rust to 0d by @Hofer-Julian in #6394
Set macOS deployment target for PyPI source builds by @tdejager in #6396
Install env in PyPI git add test by @tdejager in #6401
Fix CI on main by @Hofer-Julian in #6402
Abi3 run export handling for pixi-build-python by @pavelzw in #5751
Refresh conda-meta/pixi marker when a platform changes by @hunger in #6366
Pin boltons to 25.0.0 in purl hash-mapping test by @Hofer-Julian in #6422

Performance

Parallelize lockfile source pypi and conda satisfiability checks by @baszalmstra in #6400

Refactor

Pypi mapping module so that its a bit more logically named by @tdejager in #6302

New Contributors

@jevandezande made their first contribution in #6187

Download pixi 0.71.0



File
Platform
Checksum




pixi-aarch64-apple-darwin.tar.gz
Apple Silicon macOS
checksum


pixi-x86_64-apple-darwin.tar.gz
Intel macOS
checksum


pixi-aarch64-pc-windows-msvc.zip
ARM64 Windows
checksum


pixi-aarch64-pc-windows-msvc.msi
ARM64 Windows
checksum


pixi-x86_64-pc-windows-msvc.zip
x64 Windows
checksum


pixi-x86_64-pc-windows-msvc.msi
x64 Windows
checksum


pixi-riscv64gc-unknown-linux-gnu.tar.gz
RISCV Linux
checksum


pixi-aarch64-unknown-linux-musl.tar.gz
ARM64 MUSL Linux
checksum


pixi-x86_64-unknown-linux-musl.tar.gz
x64 MUSL Linux
checksum

View the full release notes at https://github.com/prefix-dev/pixi/releases/tag/v0.71.0.

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