[build]
pre-build = [
    "apt-get --assume-yes install curl unzip",
    "curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v25.1/protoc-25.1-linux-x86_64.zip",
    "unzip protoc-25.1-linux-x86_64.zip -d /opt/protoc",
]

[build.env]
passthrough = ["PROTOC=/opt/protoc/bin/protoc"]