Add test to ensure no special handling of hydraJobs

examples/check-utils/flake.lock

@@ -0,0 +1,56 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 0,
+        "narHash": "sha256-omjHh3LT883xERMxVEXH/oeAFI2pAAy30mhZb0eN5G4=",
+        "path": "../..",
+        "type": "path"
+      },
+      "original": {
+        "path": "../..",
+        "type": "path"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1685498995,
+        "narHash": "sha256-rdyjnkq87tJp+T2Bm1OD/9NXKSsh/vLlPeqCc/mm7qs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9cfaa8a1a00830d17487cb60a19bb86f96f09b27",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

examples/check-utils/flake.nix

@@ -1,19 +1,28 @@
 {
   description = "Flake utils demo";
 
-  inputs.flake-utils.url = "github:numtide/flake-utils";
+  inputs.flake-utils.url = "path:../..";
 
   outputs = { self, nixpkgs, flake-utils }:
     flake-utils.lib.eachDefaultSystem (system:
       let
         inherit (flake-utils.lib.check-utils system) isEqual hasKey;
         testDataset = { key1 = "value1"; key2 = 123; key3 = "some>value with^invalid&characters"; };
+        mkHydraJobs = system: {
+          toplevel = derivation { name = "toplevel"; builder = "mybuilder"; inherit system; };
+          nested = {
+            attribute = derivation { name = "nested-attribute"; builder = "mybuilder"; inherit system; };
+          };
+        };
       in
       rec {
+        hydraJobs = mkHydraJobs system;
         checks = {
           # Successful cases
           success_isEqual = isEqual testDataset.key1 "value1";
           success_hasKey = hasKey testDataset "key2";
+          # ensure no special handling of hydraJobs
+          success_hydraJobs = isEqual self.hydraJobs (flake-utils.lib.eachDefaultSystemMap mkHydraJobs);
 
           # Failing cases
           failure_isEqual = isEqual testDataset.key1 "failing-data";