1. Test current diff CMakeLists test build:
Go to the C++ tests directory: `services/tunnelbroker/src/libcpp/test`.
Run the CMake build using Nix: `nix develop --accept-flake-config --command bash -c "cmake -B build . && make -C build -j"`.
The expected result is the successfully building of the `runTests` app for gTests.
2. Test completed stack:
To test it patch to D5436 using `arc patch D5436`, run `nix develop`.
Go to tunnelbroker service directory `services/tunnelbroker` and run the Cargo building process `cargo build` or `cargo run`.
The Rust application will be successfully built.
3. CI Testing:
These diff changes are included as a part of the stack in the later D5461 diff, where the changes to CI build commands are made. The CI succeded on the D5461 which reflects that this changes are passing the build.