SciPy is a multi platform library that is distributed, most famously on pypi but in many other ways (conda, spack, rpm, deb, etc…). How can nix handle that with

SciPy is a multi platform library that is distributed, most famously on pypi but in many other ways (conda, spack, rpm, deb, etc…). How can nix handle that without requiring the user to install nix?