Hello, using kdm, I found this: $ ls -l /tmp/.X11-unix/X0 srwxrwxrwx 1 root root 0 7 mar 21:51 /tmp/.X11-unix/X0 I don't like those permissions much. Can anyone suggest a better way to handle that in nixos? Why it has permissions 777 and ownership rooot? Regards, Lluís.