{
  sources ? import ./npins,
  pkgs ? import sources.nixpkgs { },
}:

let
  nix-pkgs = import sources.nix-pkgs { inherit pkgs; };

  python3 = pkgs.python3.override {
    packageOverrides = _: _: {
      inherit (nix-pkgs) authens loadcredential;
    };
  };
in

{
  devShell = pkgs.mkShell {
    name = "annuaire.dev";

    packages = [
      (python3.withPackages (ps: [
        ps.django
        ps.pillow
        ps.loadcredential
        ps.authens
        ps.python-dateutil
      ]))
    ];

    env = {
      DJANGO_SETTINGS_MODULE = "app.settings";

      CREDENTIALS_DIRECTORY = builtins.toString ./.credentials;

      ANNUAIRE_DEBUG = builtins.toJSON true;
      ANNUAIRE_STATIC_ROOT = builtins.toString ./.static;
    };

    shellHook = ''
      if [ ! -d .static ]; then
        mkdir .static
      fi
    '';
  };
}