diff --git a/src/nix-eval-jobs.cc b/src/nix-eval-jobs.cc
index b6614b0..8ee192a 100644
--- a/src/nix-eval-jobs.cc
+++ b/src/nix-eval-jobs.cc
@@ -171,10 +171,13 @@ static void worker(
                     throw EvalError("derivation must have a 'system' attribute");
 
                 auto drvPath = drv->queryDrvPath();
+                auto localStore = state.store.dynamic_pointer_cast<LocalFSStore>();
+                auto storePath = localStore->parseStorePath(drvPath);
 
                 reply["name"] = drv->queryName();
                 reply["system"] = drv->querySystem();
                 reply["drvPath"] = drvPath;
+                reply["storePath"] = localStore->printStorePath(storePath);
 
                 nlohmann::json meta;
                 for (auto & name : drv->queryMetaNames()) {
@@ -196,9 +199,7 @@ static void worker(
                 /* Register the derivation as a GC root.  !!! This
                    registers roots for jobs that we may have already
                    done. */
-                auto localStore = state.store.dynamic_pointer_cast<LocalFSStore>();
-                auto storePath = localStore->parseStorePath(drvPath);
-                if (gcRootsDir != "" && localStore) {
+                if (gcRootsDir != "") {
                     Path root = gcRootsDir + "/" + std::string(baseNameOf(drvPath));
                     if (!pathExists(root))
                         localStore->addPermRoot(storePath, root);
diff --git a/tests/test_eval.py b/tests/test_eval.py
index 32a31e7..404985c 100644
--- a/tests/test_eval.py
+++ b/tests/test_eval.py
@@ -28,6 +28,8 @@ def common_test(extra_args: List[str]) -> None:
         built_job = results[0]
         assert built_job["attr"] == "builtJob"
         assert built_job["name"] == "job1"
+        assert built_job["storePath"].startswith("/nix/store")
+        assert built_job["drvPath"].endswith(".drv")
 
 
         substituted_job = results[1]