persistent-conda-ebs doen't allow to install more libraries?

[monitarb]

persistent-conda-ebs:

I successfully created a new env in my Notebook Instance called custom_persistent_python using OnCreate and OnStart sripts on /persistent-conda-ebs. I've installed some of the common libraries via the OnCreate script but, what happens if I need a new one?
I've tried:

• Installing it in a shell (after source activate /home/ec2-user/SageMaker/custom-miniconda/miniconda/envs/custom_persistent_python).
• Via a Notebook (!command) in the custom env.

In both cases, library seems to install ok, but it can't be used inside the Notebook (No module named xxxx), not even after Restart kernel.
I've checked the $CONDA_DEFAULT_ENV inside the Notebook and it gives JupyterSystemEnv. Does this mean I'm not inside my custom environment?
How to install new libraries, not included in the OnCreate script, that are also persistent in my new env?

[CrasCris]

Did you solve that problem?, i got a bunch of errors try to using thoses scripts idk why, i can even start the notebook instance