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It is unclear what your goal is.

Do you understand the distinction between a "system package" and a "ros package"?

It's common for a ros package/node to depend on a system package/library. A system package is built outside of the ros world, and is typically installed as a library somewhere in /usr. Your ros node then uses this library.

If the library you want to use is available through ubuntu apt or pip, you should simply be declaring this system dependency in the CMakeLists.txt file for your ros package.