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# error kind ExecutionFailed
# pre-build errors command failed: exit status: 101
# rustc version rustc 1.100.0-nightly (e71c0f1e3 2026-08-18)
# docs.rs version docsrs 0.0.0 (b67fb7d1993e3c70fff4d05e2bc482bd9d0d774f 2026-08-13 )
# build log [INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-w" "/opt/rustwide/workdir" "--user" "1001:1001" "b11aa99948e9ad3302073f20af0971fa42dfee80a0b0be5d40aaaf8044854c3d" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--all-features" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--emit=html-non-static-files\", \"--resource-suffix\", \"-20260818-1.100.0-nightly-e71c0f1e3\", \"--static-root-path\", \"/-/rustdoc.static/\", \"--cap-lints\", \"warn\", \"--extern-html-root-takes-precedence\"]" "--offline" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/aarch64-apple-darwin\"" "-j6" "--target" "aarch64-apple-darwin" "-Zrustdoc-scrape-examples", kill_on_drop: false }` [INFO] [stderr] warning: Rustdoc did not scrape the following examples because they require dev-dependencies: cb_cost_calibration, dispatch_cost_calibration, tq_distribution_analyze, tq_kernel_replay [INFO] [stderr] If you want Rustdoc to scrape these examples, then add `doc-scrape-examples = true` [INFO] [stderr] to the [[example]] target configuration of at least one example. [INFO] [stderr] warning: target filter specified, but no targets matched; this is a no-op [INFO] [stderr] Compiling serde_derive v1.0.229 [INFO] [stderr] Compiling zerocopy-derive v0.8.56 [INFO] [stderr] Compiling bytemuck_derive v1.12.0 [INFO] [stderr] Compiling foreign-types-macros v0.2.4 [INFO] [stderr] Checking core-graphics-types v0.2.0 [INFO] [stderr] Compiling thiserror-impl v2.0.20 [INFO] [stderr] Compiling mlx-native v0.10.13 (/opt/rustwide/workdir) [INFO] [stderr] warning: mlx-native@0.10.13: mlx-native: Metal Toolchain not found — attempting auto-install via `xcodebuild -downloadComponent MetalToolchain` (~700 MB download)... [INFO] [stderr] error: failed to run custom build command for `mlx-native v0.10.13 (/opt/rustwide/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/mlx-native/f46df0d584cc63d5/out/build_script_build` (exit status: 101) [INFO] [stderr] --- stdout [INFO] [stderr] cargo:rerun-if-changed=build.rs [INFO] [stderr] cargo:rerun-if-changed=src/shaders [INFO] [stderr] cargo:rerun-if-env-changed=MLX_NATIVE_SKIP_METALLIB [INFO] [stderr] cargo:warning=mlx-native: Metal Toolchain not found — attempting auto-install via `xcodebuild -downloadComponent MetalToolchain` (~700 MB download)... [INFO] [stderr] [INFO] [stderr] --- stderr [INFO] [stderr] [INFO] [stderr] thread 'main' (1049) panicked at build.rs:116:23: [INFO] [stderr] mlx-native build.rs: Metal Toolchain auto-install failed (cannot invoke xcodebuild: No such file or directory (os error 2)). Run manually: xcodebuild -downloadComponent MetalToolchain [INFO] [stderr] note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "b11aa99948e9ad3302073f20af0971fa42dfee80a0b0be5d40aaaf8044854c3d", kill_on_drop: false }`