ld plugins/sql
cargo build --quiet --bin cln-grpc
error: failed to run custom build command for `cln-grpc v0.1.2 (/sdcard/opt/lightning/cln-grpc)`

Caused by:
  process didn't exit successfully: `/sdcard/opt/lightning/target/debug/build/cln-grpc-815443097e528e12/build-script-build` (exit status: 101)
  --- stdout
  cargo:rerun-if-changed=proto/node.proto
  cargo:rerun-if-changed=proto

  --- stderr
  thread 'main' panicked at 'Could not find `protoc` installation and this build crate cannot proceed without
      this knowledge. If `protoc` is installed and this crate had trouble finding
      it, you can set the `PROTOC` environment variable with the specific path to your
      installed `protoc` binary.If you're on debian, try `apt-get install protobuf-compiler` or download it from https://github.com/protocolbuffers/protobuf/releases

  For more information: https://docs.rs/prost-build/#sourcing-protoc
  ', /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/prost-build-0.11.5/src/lib.rs:1295:10
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: ambiguous glob re-exports
  --> cln-rpc/src/model.rs:12:9
   |
12 | pub use requests::*;
   |         ^^^^^^^^^^^ the name `DelinvoiceStatus` in the type namespace is first re-exported here
13 | pub use responses::*;
   |         ------------ but the name `DelinvoiceStatus` in the type namespace is also re-exported here
   |
   = note: `#[warn(ambiguous_glob_reexports)]` on by default

make: *** [plugins/Makefile:241: target/debug/cln-grpc] Error 101
rm external/aarch64-openwrt-linux-musl/libwally-core-build/src/secp256k1/libsecp256k1.la

# rustc --version
rustc 1.70.0 (90c541806 2023-05-31)
# cargo --version
cargo 1.70.0 (ec8a8a0ca 2023-04-25)