diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index 1b1ab39..ba8347c 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -30,12 +30,6 @@ in
 
   security.apparmor.enable = true;
 
-  security.pam.yubico = {
-    enable = true;
-    id = "49094";
-    control = "required";
-  };
-
   networking = {
     hostName = "nixbld";
     firewall = {
@@ -200,6 +194,7 @@ in
   # Enable the OpenSSH daemon.
   services.openssh.enable = true;
   services.openssh.forwardX11 = true;
+  services.openssh.passwordAuthentication = false;
   programs.mosh.enable = true;
 
   programs.fish.enable = true;