For a long time I successfully use another approach (in Windows environment):
1.Install system 64-bit Python with the major version (third digit in the version can differ), used in the Cubit/Trelis/Coreform Cubit.
2. Install required packages using this system Python in the user site directory. That’s all. Embedded in the Cubit Python will see these packages.
I think that situation with the Linux is exactly the same. Additional plus is: you can use for example PyCharm Pro to prepare the code.