create carnd-term1 failed on AWS EC2

[XQ-UT]

carnd@ip-172-31-31-197:~/CarND-Term1-Starter-Kit$ conda env create -f environment-gpu.yml
Using Anaconda API: https://api.anaconda.org
Fetching package metadata ...........
Solving package specifications: ..........
Linking packages ...
Traceback (most recent call last):################################################################################## | 97%
File "/home/carnd/anaconda3/envs/carnd-term1/bin/jupyter-nbextension", line 4, in
import notebook.nbextensions
File "/home/carnd/anaconda3/envs/carnd-term1/lib/python3.5/site-packages/notebook/init.py", line 25, in
from .nbextensions import install_nbextension
File "/home/carnd/anaconda3/envs/carnd-term1/lib/python3.5/site-packages/notebook/nbextensions.py", line 23, in
from jupyter_core.paths import (
ImportError: No module named 'jupyter_core'
LinkError: Link error: Error: post-link failed for: menpo::widgetsnbextension-1.2.3-py35_1

[mvirgo]

The current AMI should have the necessary libraries installed; closing.