https://releases.nixos.org/nixos/17.09/nixos-17.09.3269.14f9ee66e63 1541867469
https://channels.nixos.org/nixos-17.09 1583923238
https://releases.nixos.org/nixos/17.09/nixos-17.09.3269.14f9ee66e63 1583929526
https://channels.nixos.org/nixos-17.09 1584180637
 1602183960
https://channels.nixos.org/nixos-17.09 1602184229