How to Install same package with both pip and pip3 provider

Hi everyone, I have both Python 2x & 3x scripts running on my server. I have several packages where I need to install both the versions of a package. How can I install the same package name with both pip and pip3? I'm getting errors where the package name is already defined (even though they're in separate classes). I've tried aliasing and that hasn't worked either. Thanks for any help....