```
cargo build --quiet --example cln-plugin-startup
error: failed to run custom build command for `cln-grpc v0.4.0 (/home/runner/work/lightning/lightning/cln-grpc)`
Caused by:
process didn't exit successfully: `/home/runner/work/lightning/lightning/target/debug/build/cln-grpc-1c0900b8d6f448d4/build-script-build` (exit status: 101)
--- stdout
cargo:rerun-if-changed=proto/node.proto
cargo:rerun-if-changed=proto
--- stderr
thread 'main' panicked at cln-grpc/build.rs:7:10:
called `Result::unwrap()` on an `Err` value: Custom { kind: NotFound, error: "Could not find `protoc`. If `protoc` is installed, try setting the `PROTOC` environment variable to the path of the `protoc` binary. Try installing `protobuf-compiler` or `protobuf` using your package manager. It is also available at https://github.com/protocolbuffers/protobuf/releases For more information: https://docs.rs/prost-build/#sourcing-protoc" }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
gmake: *** [cln-rpc/Makefile:15: target/debug/examples/cln-plugin-startup] Error 101
```
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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