lcm not available

[Yixun-Hu]

I need to get lcm to use unitree_ros_to_real, but I failed to install lcm inside conda ros2 humble:

$ conda install -c conda-forge lcm
Channels
 - conda-forge
 - robostack-humble
Platform: linux-aarch64
Collecting package metadata (repodata.json): done
Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

  - lcm

Current channels:

  - https://conda.anaconda.org/conda-forge
  - https://conda.anaconda.org/robostack-humble

To search for alternate channels that may provide the conda package you're
looking for, navigate to

    https://anaconda.org

and use the search bar at the top of the page.

How can I fix this problem?