/**
  Nixpkgs overlay adding extra packages needed for the application
*/
{
  sources ? import ../../npins,
}:
_: prev:
let
  extraPython3Packages = prev.callPackage ./python-packages { inherit sources; };

in
{
  python3 = prev.lib.attrsets.recursiveUpdate prev.python3 { pkgs = extraPython3Packages; };
  nixops4 =
    let
      sources = import ../../npins;
      inherit (import sources.flake-inputs) import-flake;
      inherit
        (import-flake {
          src = ../../.;
        })
        inputs
        ;
      inherit (inputs) nixops4;
    in
    nixops4.packages.${prev.system}.default;
}