Install the latest version of NixOps. $ nix-env -i nixops
... or list it in environment.systemPackages in /etc/nixos/configuration.nix, and nixos-rebuild switch.
Install the latest version of NixOps. $ nix-env -i nixops
... or list it in environment.systemPackages in /etc/nixos/configuration.nix, and nixos-rebuild switch.
One way (are there others?) to pin Nixpkgs, and ditch channels.