Dirty nixpkgs python

shell.nix

with import <nixpkgs> {};

mkShell {
  buildInputs = [
    (python3.withPackages(ps: [
      ps.nixpkgs
    ]))
  ];
}

webserver.py

#!/usr/bin/env python
from nixpkgs.cherrypy import cherrypy


if __name__ == '__main__':

    class HelloWorld(object):
        def index(self):
            return "Hello World!"
        index.exposed = True

    cherrypy.quickstart(HelloWorld())