diff --git a/buildbot_nix/__init__.py b/buildbot_nix/__init__.py
index 2bab8d5..a4527f0 100644
--- a/buildbot_nix/__init__.py
+++ b/buildbot_nix/__init__.py
@@ -533,6 +533,7 @@ def nix_build_config(
             updateSourceStamp=False,
             doStepIf=do_register_gcroot_if,
             copy_properties=["out_path", "attr"],
+            set_properties={"report_status": False}
         ),
     )
     factory.addStep(
@@ -597,6 +598,7 @@ def nix_skipped_build_config(
             updateSourceStamp=False,
             doStepIf=do_register_gcroot_if,
             copy_properties=["out_path", "attr"],
+            set_properties={"report_status": False}
         ),
     )
     return util.BuilderConfig(