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System pip's vendored packaging library doesn't recognize the manylinux_2_39_riscv64 platform tag and rejects the wheel as "not a supported wheel on this platform"; uv's resolver does.
The only riscv64 ray build published anywhere is 2.58.0 (cp312/cp313/cp314 only), which exceeds the ray[data, client]<2.58.0,>=2.11.0 upper bound daft's own ray extra declares, so there is no ray build daft supports to test with. Switch the test venv to cp312 too, since that is now the floor our registry publishes riscv64 numpy/pandas/pyarrow builds for.
uv pip install only honors its own UV_EXTRA_INDEX_URL/UV_ONLY_BINARY, not the PIP_-prefixed names copied from cibuildwheel's pip-based test steps elsewhere in this repo. With those silently ignored, uv resolved pyarrow==25.0.1 against public PyPI only (no riscv64 wheel there) and source-built it, which needs the real Arrow C++ CMake package the manylinux image doesn't carry -- surfacing ~6.5h later as a CMake "could not find Arrow" configure error that looked like a missing native dependency of daft itself. Swap to UV_EXTRA_INDEX_URL/ UV_ONLY_BINARY and add UV_INDEX_STRATEGY=unsafe-best-match so uv actually reaches our registry's riscv64 pyarrow/numpy/pandas builds (same pattern as build-matplotlib.yml/build-onnx.yml). See CLAUDE.md gotcha 244.
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daft0.7.24Compiles Daft's PyO3/maturin extension module and its ~50-crate internal workspace (arrow, tokio, opentelemetry, etc.). Upstream publishes no riscv64 wheel.
Mirrors upstream's
build-wheel.ymlbuildjob.Differs from upstream
Cargo.tomldirectly instead of viasetuptools_scm- we only ever build an exact release tag.DAFT_DASHBOARD_SKIP_BUILD=1skips the bundled dashboard's Node/npm frontend build - not needed for the Python package or its tests.Testing
tests/dataframeunder thenativerunner only - the only riscv64raybuild published anywhere (2.58.0) exceeds daft's ownray<2.58.0extras boundLicense: OK
Built on cp310 (abi3).