ntpd-rs: inherit nixos test

pkgs/tools/networking/ntpd-rs/default.nix

@@ -5,6 +5,7 @@
 , installShellFiles
 , pandoc
 , Security
+, nixosTests
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -50,6 +51,12 @@ rustPlatform.buildRustPackage rec {
 
   outputs = [ "out" "man" ];
 
+  passthru = {
+    tests = {
+      nixos = lib.optionalAttrs stdenv.isLinux nixosTests.ntpd-rs;
+    };
+  };
+
   meta = with lib; {
     description = "A full-featured implementation of the Network Time Protocol";
     homepage = "https://tweedegolf.nl/en/pendulum";