How to make (custom Python) kernels support debugging?

[ChanceHarrison]

"JupyterLab ships with a Debugger front-end by default." "For the debugger to be enabled and visible, a kernel with support for debugging is required." from JupyterLab docs

When I use the default Python 3 (ipykernel), I can use debugging, but I can't use debugging on any kernel defined in kernels.nix.

For example: in kernels.nix:

{pkgs, ...}: {
  kernel.python.trivial = {
    enable = true;
  };
  /* [...other kernels...] */
}

Results in:

My rudimentary understanding is that these kernels are just ipykernel under the hood, so I'm not sure why debugging doesn't work?

Thus, this issue. Any assistance on getting debugging to work on custom kernels would be much appreciated. Let me know if I can provide additional information/context myself. Thanks!

[GTrunSec]

solved by: da28e53

the bugger will be enabled by default.