not-os: Include linien-server in python package

- client supports starting server remotely if the server is not started.
    This requires python to have access to linien_server package to
    check linien_server version

flake.nix

@@ -416,8 +416,7 @@
           ] ++ pkgs.lib.optionals (board == "fast-servo") [
             ({ config, pkgs, lib, ... }: {
               environment.systemPackages = [
-                linien-server
-                (pkgs.python3.withPackages(ps: [ pyfastservo ]))
+                (pkgs.python3.withPackages(ps: with ps; [ pyfastservo linien-server]))
               ];
               boot.postBootCommands = lib.mkAfter ''