{
  description = "Dev Setup";

  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  inputs.flake-utils.url = "github:numtide/flake-utils";
  inputs.pip2nix = {
    url = "github:nix-community/pip2nix";
    flake = false;
    # inputs.nixpkgs.follows = "nixpkgs"; # inputs.flake-utils.follows = "flake-utils";
  };

  outputs = {nixpkgs, flake-utils, pip2nix, ...}:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system;
                                config.allowBroken = true;
                              };
        #attrsets = pkgs.lib.attrsets;
        #overrideFiles = (attrsets.filterAttrs (f: type: type == "regular") (builtins.readDir ./python));
        #overridePackageNames = attrsets.mapAttrsToList (f: _:  builtins.replaceStrings [".nix"] [""] f) overrideFiles;
        py = pkgs.callPackage ./python.nix { inherit pkgs; };
        #  packageOverrides = pself: psuper:
        #    attrsets.genAttrs overridePackageNames (o: pself.callPackage ./python/${o}.nix {});
        #});
        #newversion = python3.pkgs.newversion.overrideAttrs(old: {
        #  propagatedBuildInputs = old.propagatedBuildInputs ++ [python3.pkgs.setuptools];
        #});
        assets = pkgs.callPackage ./node/frappe-assets.nix {};
        penv = py.buildEnv.override {
          extraLibs = [ py.pkgs.frappe py.pkgs.erpnext ];
        };
        runErpNext = pkgs.writeShellScriptBin "runErpNext" ''
          export PYTHON_PATH=${penv}/${py.sitePackages}
          sites=$(mktemp -d)
          for f in ${assets}/share/sites/*; do
              ln -s "$f" "$sites/$(basename $f)"
          done
          cat >$sites/common_site_config.json <<EOF
          {
            "db_host": "foo",
            "db_port": 1336,
            "db_name": "foo" ,
            "redis_cache": "foo",
            "redis_queue": "foo",
            "redis_socketio": "foo",
            "socketio_port": 6732,
            "maintenance_mode": true
          }
          EOF
          echo "Sites dir: $sites"
          ${penv}/bin/gunicorn --chdir="$sites" --bind=0.0.0.0:9090 --threads=4 --workers=2 --worker-class=gthread --worker-tmp-dir=/dev/shm --timeout=120 --preload frappe.app:application
        '';
      in rec {
        packages = {
          devEnv = pkgs.buildEnv {
            name = "erpnext-nix-dev-env";
            paths = [
              pkgs.dasel
            ];
          };
          inherit pkgs runErpNext assets;
          pip2nix = import "${pip2nix}/default.nix" { inherit pkgs; pythonPackages = "python310Packages"; };
          erpnext = py.pkgs.erpnext;
          pythonPkgs = py.pkgs;
        };
    });
}