Adventures in NixOS unstable

Peer pressure resulted from switching back to 16.09 stable branch 125ffff -> 31c72ce2

Oct 22 15:09:30 gum systemd[1]: Started Redis Server.
Oct 22 15:09:30 gum redis[28655]: You requested maxclients of 10000 requiring
at …

Accidentally updated from stable channel to unstable: 0546a4a -> 125ffff

services.xserver.displayManager.sessionCommands = ''
  ${pkgs.xorg.xhost}/bin/xhost +local:
'';