Build error

[GameOverStudios]

hi, i trying build and i receive this error...

error: failed to run custom build command for nostr-rs-relay v0.8.13 (/workspaces/nostr-rs-relay)

Caused by:
process didn't exit successfully: /workspaces/nostr-rs-relay/target/release/build/nostr-rs-relay-026f953f295ab1c6/build-script-build (exit status: 1)
--- stdout
cargo:rerun-if-changed=proto/nauthz.proto
cargo:rerun-if-changed=proto

--- stderr
Error: Custom { kind: Other, error: "protoc failed: Unknown flag: --experimental_allow_proto3_optional\n" }

i change comments this line --experimental_allow_proto3_optiona and receive error again..

why?

[CirKu17]

Same error here on 0.9.0, related issue: #74 .
However in my case installing the protobuf + protobuf-compiler packages didn't work.

[scsibug]

What version of protoc do you have (protoc --version), and how did you install it? I believe you need at v3.12, which is when the compiler began supporting optional fields as an experiemental option. That was released May 2020, so it should be in all the latest package manager distributions.