[Bug Report] Dependency conflicts (click/psutil) block isaaclab core installation; ModuleNotFoundError when running examples (only subpackages installed)

[gyc75148962]

Describe the bug

When attempting to install the IsaacLab library, the installation fails due to dependency conflicts with the existing environment. Specifically:

isaacsim-kernel 5.1.0.0 requires click==8.1.7 and psutil==5.9.8

rl-games 1.6.1 requires psutil<6.0.0,>=5.9.0

However, the environment currently has click 8.4.1 and psutil 7.2.2 installed, which are incompatible with these requirements.

As a result, the IsaacLab core library failed to install successfully. The following sub-packages were installed without issues:

isaaclab_assets 0.2.3
isaaclab_mimic 1.0.15
isaaclab_rl 0.4.4
isaaclab_tasks 0.11.6

However, the main isaaclab library itself is missing / not installed.

Steps to reproduce

Please try to provide a minimal example to reproduce the bug. Error messages and stack traces are also helpful.

conda create -n leisaac python=3.11 -y
conda activate leisaac
pip install --upgrade pip
pip install "isaacsim[all,extscache]==5.1.0" --extra-index-url https://pypi.nvidia.com
pip install -U torch==2.7.0 torchvision==0.22.0 --index-url https://download.pytorch.org/whl/cu128
isaacsim isaacsim.exp.full.kit --no-window
git clone https://gh-proxy.org/https://github.com/isaac-sim/IsaacLab.git
cd IsaacLab
git checkout v2.3.0
sudo apt install cmake build-essential
./isaaclab.sh --install

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
isaacsim-kernel 5.1.0.0 requires click==8.1.7, but you have click 8.4.1 which is incompatible.
isaacsim-kernel 5.1.0.0 requires psutil==5.9.8, but you have psutil 7.2.2 which is incompatible.
rl-games 1.6.1 requires psutil<6.0.0,>=5.9.0, but you have psutil 7.2.2 which is incompatible.

then，i try to

./isaaclab.sh -p scripts/tutorials/00_sim/create_empty.py

[INFO] Using python from: /data/lizq/miniconda3/envs/leisaac/bin/python                                                                              
Traceback (most recent call last):
  File "/data/groot-n1.5/IsaacLab/scripts/tutorials/00_sim/create_empty.py", line 20, in <module>
    from isaaclab.app import AppLauncher
ModuleNotFoundError: No module named 'isaaclab'

so，i checked the conda

pip list | grep isaac

isaaclab_assets            0.2.3        /data/groot-n1.5/IsaacLab/source/isaaclab_assets
isaaclab_mimic             1.0.15       /data/groot-n1.5/IsaacLab/source/isaaclab_mimic
isaaclab_rl                0.4.4        /data/groot-n1.5/IsaacLab/source/isaaclab_rl
isaaclab_tasks             0.11.6       /data/groot-n1.5/IsaacLab/source/isaaclab_tasks

System Info

Describe the characteristic of your environment:

• Commit: 3c6e67b
• Isaac Sim Version: 5.1 installed by pip install "isaacsim[all,extscache]==5.1.0" --extra-index-url https://pypi.nvidia.com
• OS: Ubuntu 24.04.3 LTS
• GPU: NVIDIA A800 80GB PCIe
• CUDA: release 12.0, V12.0.140
• GPU Driver: 560.28.03

Checklist

• I have checked that there is no similar issue in the repo (required)
• I have checked that the issue is not in running Isaac Sim itself and is related to the repo

[d-kleine]

Please checkout at v2.3.2 and see #4576, does this fix your issue?

[gyc75148962]

Thanks for your suggestion.

I tried git checkout v2.3.2 and then ran ./isaaclab.sh --install, but this did not resolve my issue — I still couldn't install the isaaclab module.

Then I looked into #4576 and followed the suggested steps:

pip install pip==23
pip install setuptools==65
./isaaclab.sh --install

However, during the installation, I still got the following dependency conflict errors:

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
isaacsim-kernel 5.1.0.0 requires click==8.1.7, but you have click 8.4.1 which is incompatible.
isaacsim-kernel 5.1.0.0 requires psutil==5.9.8, but you have psutil 7.2.2 which is incompatible.
rl-games 1.6.1 requires psutil<6.0.0,>=5.9.0, but you have psutil 7.2.2 which is incompatible.

Despite these errors, when I ran pip list | grep isaac, I found that all IsaacLab-related packages were actually installed successfully:

isaaclab                   0.54.2       /data/groot-n1.5/IsaacLab/source/isaaclab
isaaclab_assets            0.2.4        /data/groot-n1.5/IsaacLab/source/isaaclab_assets
isaaclab_contrib           0.0.2        /data/groot-n1.5/IsaacLab/source/isaaclab_contrib
isaaclab_mimic             1.0.16       /data/groot-n1.5/IsaacLab/source/isaaclab_mimic
isaaclab_rl                0.4.7        /data/groot-n1.5/IsaacLab/source/isaaclab_rl
isaaclab_tasks             0.11.12      /data/groot-n1.5/IsaacLab/source/isaaclab_tasks

After that, I tested with the following two commands:

./isaaclab.sh -p scripts/tutorials/00_sim/create_empty.py
./isaaclab.sh -p scripts/reinforcement_learning/rsl_rl/train.py --task=Isaac-Ant-v0 --headless

Both ran successfully.

However, I'm still a bit concerned about the click and psutil dependency conflicts mentioned above. Will these cause any potential issues, or are they safe to ignore?

Thanks!

[RandomOakForest]

@zoctipus for vis.