pkgs/windmill: Passthrough nixos tests in package recipe

pkgs/by-name/wi/windmill/package.nix

@@ -42,6 +42,7 @@
   coreutils,
   withEnterpriseFeatures ? false,
   withClosedSourceFeatures ? false,
+  nixosTests,
 }:
 
 let
@@ -243,6 +244,8 @@ rustPlatform.buildRustPackage (finalAttrs: {
     ./update-ui_builder.sh
   ];
 
+  passthru.tests = lib.optionalAttrs (stdenv.hostPlatform.isLinux) nixosTests.windmill;
+
   meta = {
     changelog = "https://github.com/windmill-labs/windmill/blob/${src.rev}/CHANGELOG.md";
     description = "Open-source developer platform to turn scripts into workflows and UIs";