diff --git a/nix/nixos-module/container/dhcp-server.nix b/nix/nixos-module/container/dhcp-server.nix
index 2dd0393..c4c00ea 100644
--- a/nix/nixos-module/container/dhcp-server.nix
+++ b/nix/nixos-module/container/dhcp-server.nix
@@ -19,7 +19,7 @@ let
   enabled = builtins.length (builtins.attrNames dhcpNets) > 0;
 in
 {
-  services.kea.dhcp4 = lib.optionalAttrs enabled {
+  services.kea.dhcp4 = lib.mkIf enabled {
     enable = true;
 
     settings = {
@@ -171,7 +171,7 @@ in
           );
     };
   };
-  services.kea.dhcp6 = lib.optionalAttrs enabled {
+  services.kea.dhcp6 = lib.mkIf enabled {
     enable = true;
 
     settings = {
@@ -240,7 +240,7 @@ in
       #    )));
     };
   };
-  services.kea.dhcp-ddns = lib.optionalAttrs enabled {
+  services.kea.dhcp-ddns = lib.mkIf enabled {
     enable = true;
 
     settings = {