shims.d.ts and enums.d.ts don't generated (pxt buildshims ?)

[nevergone]

I would like build the following micro:bit extension: https://github.com/emakefun/pxt-irRemote (commit: 449e6642)
I used the following descriptions:

• https://github.com/kshannon-ucsd/pxt-pixy2?tab=readme-ov-file#developer-setup
• https://makecode.com/simshim

Used build environment: docker pull nevergone/microbit-makecode-editor:7.0.57-tools

The error is shown here:

You cannot access the content of the C++ code, even though it is also found in the pxt.json file. Does not generate shims.d.ts and enums.d.ts files and pxt buildshims command does nothing.

What am I doing wrong? The extension can be added to the makecode, so it can definitely be built somehow.

[nevergone]

Attached builded extension.

binary.hex.zip

[nevergone]

So, if an expansion contains only TS code, it will be compiled by "pxt serve" if it is found in the pxtarget.json file.

If an extension also contains C++ code, it will not be compiled by "pxt serve" and if it is found in the "pxtarget.json" file under the "bundleddirs" entry, it cannot be added directly to the project because it will cause the above error.
The only way to use it is to compile the extension with the "pxt build" command and then add the "binary.hex" file as a makecode extension in the web interface.

Is it possible to use "pxt serve" in this case? All necessary tools are available.