NetBSD/amd64 9.99.2

Building stage1 std artifacts (x86_64-unknown-netbsd -> x86_64-unknown-netbsd)

running: "/tmp/lang/rust/work/rust-bootstrap/bin/cargo" "build"
"--target" "x86_64-unknown-netbsd" "-j" "4" "--release" "--frozen"
"--features" "panic-unwind backtrace" "--manifest-path"
"/tmp/lang/rust/work/rustc-1.36.0-src/src/libstd/Cargo.toml"
"--message-format" "json"

   Compiling core v0.0.0 (/tmp/lang/rust/work/rustc-1.36.0-src/src/libcore)
   Compiling compiler_builtins v0.1.14
   Compiling libc v0.2.54
error: failed to run custom build command for `compiler_builtins v0.1.14`

process didn't exit successfully:
`/tmp/lang/rust/work/rustc-1.36.0-src/build/x86_64-unknown-netbsd/stage1-std/
   release/build/compiler_builtins-8e384cdd32115157/build-script-build`
(exit code: 1)

--- stderr
dead lock detected

Another run completed the packaging, thanks @ryo_on