Build fails: rclc/rclc.h and uxr/client/transport.h not found

Hardware description: STM32F4
RTOS: ThreadX
Installation type: n/a
Version or commit hash: latest (d14d5bd)

Steps to reproduce the issue

Compile as desribed in the redame:

python3 -m venv venv
source ./venv/bin/activate
pip3 install catkin_pkg lark-parser empy colcon-common-extensions

git clone --recursive https://github.com/micro-ROS/micro_ros_azure_rtos_app
cd micro_ros_azure_rtos_app
cmake -Bbuild -GNinja
cmake --build build # run this three times

Expected behavior

Successful build/no errors

Actual behavior

The first two build runs produce errors, but there are fixed by subsequent runs as the required byproducts are produced. The third and all further runs result in the errors:

[...]
micro_ros_azure_rtos_app/app/microros_netx_transports.c:1:10: fatal error: uxr/client/transport.h: No such file or directory
    1 | #include <uxr/client/transport.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
[...]
micro_ros_azure_rtos_app/app/main.c:9:10: fatal error: rclc/rclc.h: No such file or directory
    9 | #include <rclc/rclc.h>
      |          ^~~~~~~~~~~~~
compilation terminated.

(Build command output has been removed for brevity)

Additional information

The repository has been successfully cloned. The two files rclc.h and transport.h can be found in their respective paths on disk. The same error occurs with the previous commit (f83776e). I was also a little suspect of Ninja, but compiling with cmake -Bbuild -G "Unix Makefiles" yields the same result.

This seems to either be some sort of build system issue or an environment problem. Perhaps the readme is missing some implicit steps I'm unaware of?

micro-ROS / micro_ros_azure_rtos_app