# Pastebin GV6GgVCJ
[romain@clevo-N141ZU:~]$ nr
building Nix...
building the system configuration...
error: The option `services.xserver.displayManager.lightdm.enable' has conflicting definitions, in `/home/romain/nixos/generic.nix' and `/nix/var/nix/profiles/per-user/root/channels/nixos/nixos/modules/services/x11/xserver.nix'.
(use '--show-trace' to show detailed location information)