python-gpiozero package install issue

I have installed both python-gpiozero & python-raspberry-gpio packages from repository. But while running python file requiring gpiozero module., I get the following error message

$python3 /home/cherian/Downloads/PiFanControl/manjaro-arm/fancontrol.py
Traceback (most recent call last):
  File "/home/cherian/Downloads/PiFanControl/manjaro-arm/fancontrol.py", line 7, 
in <module> from gpiozero import OutputDevice ModuleNotFoundError: No module named 'gpiozero'

Looks like python-gpiozero is not properly installed. Installing pip to install python-gpiozero would be a lengthy process. python-gpiozero version 3.6 is installed while there is a latest python 3.7 installed on the device. Any help to resolve gpiozero import in python file will be helpful.

Do I have to install python3-gpiozero. Not available in the repository.

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