--mount "type=volume,source=gocache,destination=/gocache" \
    --mount "type=volume,source=cache,destination=/home/.cache" \
    --mount "type=volume,source=crates,destination=/home/.cargo/registry" \
    --mount "type=volume,source=git-crates,destination=/home/.cargo/git" \
    ${CONDITIONAL_HOST_MOUNTS} \

      return
    fi
  fi
  if [[ "${BUILD_ZTUNNEL_REPO:-}" == "" ]]; then
    return
  fi

  if ! which cargo; then
    echo "the rust toolchain (cargo, etc) is required for building ztunnel"
    return 1
  fi

  pushd "${BUILD_ZTUNNEL_REPO}"
  cargo build --profile="${BUILD_ZTUNNEL_PROFILE:-dev}" ${BUILD_ZTUNNEL_TARGET:+--target=${BUILD_ZTUNNEL_TARGET}}

  local ZTUNNEL_BIN_PATH