1 files changed, 13 insertions, 6 deletions
diff --git a/src/libstore/fetchers/registry.hh b/src/libstore/fetchers/registry.hh
index e29f78486..6063f51d6 100644
--- a/src/libstore/fetchers/registry.hh
+++ b/src/libstore/fetchers/registry.hh
@@ -1,13 +1,12 @@
 #pragma once
 
 #include "types.hh"
+#include "fetchers.hh"
 
 namespace nix { class Store; }
 
 namespace nix::fetchers {
 
-struct Input;
-
 struct Registry
 {
     enum RegistryType {
@@ -18,7 +17,13 @@ struct Registry
 
     RegistryType type;
 
-    std::vector<std::pair<std::shared_ptr<const Input>, std::shared_ptr<const Input>>> entries;
+    std::vector<
+        std::tuple<
+            std::shared_ptr<const Input>, // from
+            std::shared_ptr<const Input>, // to
+            Input::Attrs // extra attributes
+            >
+        > entries;
 
     Registry(RegistryType type)
         : type(type)
@@ -31,7 +36,8 @@ struct Registry
 
     void add(
         const std::shared_ptr<const Input> & from,
-        const std::shared_ptr<const Input> & to);
+        const std::shared_ptr<const Input> & to,
+        const Input::Attrs & extraAttrs);
 
     void remove(const std::shared_ptr<const Input> & input);
 };
@@ -46,9 +52,10 @@ Registries getRegistries(ref<Store> store);
 
 void overrideRegistry(
     const std::shared_ptr<const Input> & from,
-    const std::shared_ptr<const Input> & to);
+    const std::shared_ptr<const Input> & to,
+    const Input::Attrs & extraAttrs);
 
-std::shared_ptr<const Input> lookupInRegistries(
+std::pair<std::shared_ptr<const Input>, Input::Attrs> lookupInRegistries(
     ref<Store> store,
     std::shared_ptr<const Input> input);