I recommend not mixing the default channel with the conda-forge channel.

Instead of using miniconda or anaconda, use miniforge: https://github.com/conda-forge/miniforge. Minifore is maintained by the conda-forge community, is available on more platforms, and defaults to conda-forge.

Also, the mambaforge flavors includes mamba in the base environment.

```

mamba install jupyterlab

```

should perform much faster than the conda version, without any memory error.