diff --git a/modules/c3d2.nix b/modules/c3d2.nix
index d59ea95a..256002db 100644
--- a/modules/c3d2.nix
+++ b/modules/c3d2.nix
@@ -104,6 +104,13 @@ in
             openssh.authorizedKeys.keys = adminKeys;
           };
 
+          # TODO: change when on 23.05
+          # https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/profiles/installation-device.nix#L23
+          # nixos = lib.mkIf (config.system.nixos.variant_id == "installer") { openssh.authorizedKeys.keys = adminKeys; };
+          # using proxy option to detect iso
+          # https://github.com/NixOS/nixpkgs/blob/nixos-22.11/nixos/modules/profiles/installation-device.nix#L48
+          nixos = lib.mkIf (config.services.getty.autologinUser == "nixos") { openssh.authorizedKeys.keys = adminKeys; };
+
           root.openssh.authorizedKeys.keys = adminKeys;
         };
       };