better python handling in nix module

module.nix

@@ -5,6 +5,7 @@ let
   format = pkgs.formats.json {};
   types = lib.types;
   config_oauth_secret = "${cfg.settings.DATA_FOLDER}/lenticular_oauth_secret.toml";
+  python_env = python.withPackages (ps: with ps; [ lenticular-cloud gevent setuptools ]);
 in
 {
   options = with lib.options; {
@@ -135,13 +136,10 @@ in
       enable = cfg.enable;
 
       environment = let
-        python_path = with python.pkgs; makePythonPath [ pkgs.lenticular-cloud gevent setuptools ];
         config_file = format.generate "lenticular-cloud.json" cfg.settings;
       in {
         # CONFIG_FILE = "/etc/lenticular_cloud/production.conf";
         CONFIG_FILE = "${config_file}:${config_oauth_secret}";
-        PYTHONPATH = "${python_path}";
-        # PYTHONPATH =  "${lenticular-pkg.pythonPath}:${lenticular-pkg}/lib/python3.10/site-packages:${python_path}";
       };
       preStart = ''
         if [[ ! -e "${config_oauth_secret}" ]]; then
@@ -156,7 +154,7 @@ in
         Type = "simple";
         WorkingDirectory = cfg.settings.DATA_FOLDER;
         User = cfg.username;
-        ExecStart = ''${python.pkgs.gunicorn}/bin/gunicorn lenticular_cloud.wsgi --name lenticular_cloud \
+        ExecStart = ''${python_env}/bin/gunicorn lenticular_cloud.wsgi --name lenticular_cloud \
               --workers 2 --log-level=info \
               --bind=unix:/run/${cfg.username}/web.sock \
               -k gevent'';