# Pastebin uhAQjz39
[root@nixops:~]# nixos-rebuild switch --upgrade
downloading Nix expressions from ‘https://nixos.org/releases/nixos/14.12/nixos-14.12.885.b373bf9/nixexprs.tar.xz’...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   273  100   273    0     0    405      0 --:--:-- --:--:-- --:--:--   405
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
unpacking channels...
error: syntax error, unexpected UPDATE, at "(string)":1:195
cannot unpack the channels at /run/current-system/sw/bin/nix-channel line 150.