フォロー
ERROR Failed to start keybase.service.
https://github.com/NixOS/nixpkgs/blob/b68a6a27adb452879ab66c0eaac0c133e32823b2/pkgs/tools/security/keybase/default.nix#L37
こゆことか
services.keybase.enable = true;
https://github.com/nix-community/home-manager/blob/master/modules/services/keybase.nix
nixpkgsなのでイマイチわからん
https://github.com/NixOS/nixpkgs/issues/108091