Build fails in git submodules

[yurivict]

I am getting this failure:

  running: "cmake" "/usr/ports/databases/materialize/work/rust-rdkafka-8ea07c4d2b96636ff093e670bc921892aee0d56a/rdkafka-sys/librdkafka" "-DRDKAFKA_BUILD_STATIC=1" "-DRDKAFKA_BUILD_TESTS=0" "-DRDKAFKA_BUILD_EXAMPLES=0" "-DCMAKE_INSTALL_LIBDIR=lib" "-DWITH_ZLIB=1" "-DWITH_CURL=0" "-DWITH_SSL=1" "-DWITH_SASL_SCRAM=1" "-DWITH_SASL_OAUTHBEARER=1" "-DWITH_SASL=0" "-DWITH_ZSTD=1" "-DENABLE_LZ4_EXT=0" "-DCMAKE_INSTALL_PREFIX=/usr/ports/databases/materialize/work/target/release/build/rdkafka-sys-ee3c7cdabebb9f9d/out" "-DCMAKE_C_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64 -pipe -fstack-protector-strong -fno-strict-aliasing" "-DCMAKE_C_COMPILER=/usr/local/libexec/ccache/cc" "-DCMAKE_CXX_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64 -pipe -fstack-protector-strong -fno-strict-aliasing" "-DCMAKE_CXX_COMPILER=/usr/local/libexec/ccache/c++" "-DCMAKE_ASM_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64 -pipe -fstack-protector-strong -fno-strict-aliasing" "-DCMAKE_ASM_COMPILER=/usr/local/libexec/ccache/cc" "-DCMAKE_BUILD_TYPE=Debug"

  --- stderr
  Setting up submodules
  Running command: "git submodule update --init" in dir: ../
  Building and linking librdkafka statically
  CMake Warning:
    Ignoring extra path from command line:

     "/usr/ports/databases/materialize/work/rust-rdkafka-8ea07c4d2b96636ff093e670bc921892aee0d56a/rdkafka-sys/librdkafka"


  CMake Error: The source directory "/usr/ports/databases/materialize/work/rust-rdkafka-8ea07c4d2b96636ff093e670bc921892aee0d56a/rdkafka-sys/librdkafka" does not appear to contain CMakeLists.txt.
  Specify --help for usage, or press the help button on the CMake GUI.
  thread 'main' panicked at '
  command did not execute successfully, got: exit status: 1

  build script failed, must exit now', /usr/ports/databases/materialize/work/materialize-0.40.0/cargo-crates/cmake-0.1.48/src/lib.rs:975:5
  stack backtrace:
     0: rust_begin_unwind
     1: core::panicking::panic_fmt
     2: cmake::fail
               at /usr/ports/databases/materialize/work/materialize-0.40.0/cargo-crates/cmake-0.1.48/src/lib.rs:975:5
     3: cmake::run
               at /usr/ports/databases/materialize/work/materialize-0.40.0/cargo-crates/cmake-0.1.48/src/lib.rs:953:9
     4: cmake::Config::build
               at /usr/ports/databases/materialize/work/materialize-0.40.0/cargo-crates/cmake-0.1.48/src/lib.rs:780:13
     5: build_script_build::build_librdkafka
               at ./build.rs:280:15
     6: build_script_build::main
               at ./build.rs:80:9
     7: core::ops::function::FnOnce::call_once
               at /wrkdirs/usr/ports/lang/rust/work/rustc-1.66.1-src/library/core/src/ops/function.rs:251:5
  note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
*** Error code 101

On one hand, this failure needs to be fixed.

On the other hand, I need to use the prebuilt version coming from the package librdkafka-1.9.2

How to use the external librdkafka?