diff --git a/nixos/modules/services/monitoring/nagios.nix b/nixos/modules/services/monitoring/nagios.nix
index 2c7f0ed1966..69173ce4e44 100644
--- a/nixos/modules/services/monitoring/nagios.nix
+++ b/nixos/modules/services/monitoring/nagios.nix
@@ -102,8 +102,8 @@ in
 
       plugins = mkOption {
         type = types.listOf types.package;
-        default = with pkgs; [ monitoring-plugins ssmtp mailutils ];
-        defaultText = literalExpression "[pkgs.monitoring-plugins pkgs.ssmtp pkgs.mailutils]";
+        default = with pkgs; [ monitoring-plugins msmtp mailutils ];
+        defaultText = literalExpression "[pkgs.monitoring-plugins pkgs.msmtp pkgs.mailutils]";
         description = "
           Packages to be added to the Nagios <envar>PATH</envar>.
           Typically used to add plugins, but can be anything.