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|
{ config, lib, ... }:
let
inherit (lib)
mkIf
mkOption
stringAfter
types
;
cfg = config.nix;
in
{
options = {
system = {
defaultChannel = mkOption {
internal = true;
type = types.str;
default = "https://nixos.org/channels/nixos-unstable";
description = lib.mdDoc "Default NixOS channel to which the root user is subscribed.";
};
};
};
config = mkIf cfg.enable {
system.activationScripts.nix-channel = stringAfter [ "etc" "users" ]
''
# Subscribe the root user to the NixOS channel by default.
if [ ! -e "/root/.nix-channels" ]; then
echo "${config.system.defaultChannel} nixos" > "/root/.nix-channels"
fi
'';
};
}
|