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# error kind ExecutionFailed
# pre-build errors command failed: exit status: 101
# rustc version rustc 1.98.0-nightly (6368fd52c 2026-05-29)
# docs.rs version docsrs 0.0.0 (f16e33f3e6ac9fc9e4413728c5dd1b2ba1c6b799 2026-05-23 )
# 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" "e92feff3be73c806cef1192a24f17dd9c62a6b17814d1c076bb6140489ade9ce" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--all-features" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--emit=invocation-specific\", \"--resource-suffix\", \"-20260529-1.98.0-nightly-6368fd52c\", \"--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}/x86_64-unknown-linux-gnu\"" "-Zrustdoc-scrape-examples" "-j6" "--target" "x86_64-unknown-linux-gnu", kill_on_drop: false }` [INFO] [stderr] warning: target filter specified, but no targets matched; this is a no-op [INFO] [stderr] Compiling selinux-sys v0.7.0 [INFO] [stderr] Compiling uu_stdbuf v0.9.0 [INFO] [stderr] Compiling coreutils v0.9.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking rayon v1.12.0 [INFO] [stderr] Checking string-interner v0.20.0 [INFO] [stderr] Checking crossterm v0.29.0 [INFO] [stderr] error: failed to run custom build command for `uu_stdbuf v0.9.0` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/uu_stdbuf-61eadbbb21c5d164/build-script-build` (exit status: 1) [INFO] [stderr] --- stdout [INFO] [stderr] cargo:rerun-if-changed=build.rs [INFO] [stderr] cargo:rerun-if-changed=src/libstdbuf/src/libstdbuf.rs [INFO] [stderr] [INFO] [stderr] --- stderr [INFO] [stderr] [INFO] [stderr] Error: The 'feat_external_libstdbuf' feature requires the LIBSTDBUF_DIR environment variable to be set. [INFO] [stderr] Usage: LIBSTDBUF_DIR=/path/to/lib/directory cargo build --features feat_external_libstdbuf [INFO] [stderr] Example: LIBSTDBUF_DIR=/usr/lib cargo build --features feat_external_libstdbuf [INFO] [stderr] [INFO] [stderr] This directory should point to where libstdbuf.so / libstdbuf.dylib will be installed on the target system. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "e92feff3be73c806cef1192a24f17dd9c62a6b17814d1c076bb6140489ade9ce", kill_on_drop: false }`