diff --git a/src/libfetchers/indirect.cc b/src/libfetchers/indirect.cc
index 4874a43ff..e09d8bfb8 100644
--- a/src/libfetchers/indirect.cc
+++ b/src/libfetchers/indirect.cc
@@ -98,6 +98,11 @@ struct IndirectInputScheme : InputScheme
     {
         throw Error("indirect input '%s' cannot be fetched directly", input.to_string());
     }
+
+    std::optional<ExperimentalFeature> experimentalFeature() override
+    {
+        return Xp::Flakes;
+    }
 };
 
 static auto rIndirectInputScheme = OnStartup([] { registerInputScheme(std::make_unique<IndirectInputScheme>()); });