export nix module

nix/checks/module-eval.nix

@@ -0,0 +1,37 @@
+{
+  lib,
+  nixpkgs,
+  module,
+  pkgs,
+  system,
+}:
+
+let
+  evaluatedHostName =
+    (nixpkgs.lib.nixosSystem {
+      inherit system;
+      modules = [
+        module
+        {
+          system.stateVersion = "26.05";
+
+          services.rabbi-gerzi = {
+            enable = true;
+            frontend.hostName = "www.example.test";
+            backend = {
+              hostName = "api.example.test";
+              environmentFile = "/run/secrets/rabbi-gerzi.env";
+            };
+          };
+        }
+      ];
+    }).config.services.rabbi-gerzi.backend.hostName;
+in
+pkgs.runCommand "rabbi-gerzi-module-eval"
+  {
+    value = evaluatedHostName;
+    preferLocalBuild = true;
+  }
+  ''
+    echo "$value" > $out
+  ''