Package installation got freeze through conda env/virtualenv pip

I am trying to install package through pip in Virtualenv or archiconda3. But when I type:

pip install numpy

it is hang out with:

(FPM_env) dlinano@jetson-nano:~$ pip install numpy
Collecting numpy
  Using cached https://files.pythonhosted.org/packages/ff/59/d3f6d46aa1fd220d020bdd61e76ca51f6548c6ad6d24ddb614f4037cf49d/numpy-1.17.4.zip
Building wheels for collected packages: numpy
  Building wheel for numpy (setup.py) ... |

It is normal with pip installed from build-in python3 of jetson nano.

I hope someone can help me out with this.

Bests,

Hi,

Based on the log, it looks like the installation is starting

Building wheels for collected packages: numpy
  Building wheel for numpy (setup.py) ... |

Did you meet any error on the installation?
You will need to wait for a while since the installation may take hours to finish.

Thanks.