1 files changed, 1 insertions, 1 deletions
diff --git a/build/rule b/build/rule
index c7134e1..7a4d4d7 100644
--- a/build/rule
+++ b/build/rule
@@ -30,7 +30,7 @@ namespace build
 
   using target_rule_map = std::unordered_map<
     std::type_index,
-    butl::prefix_multimap<std::string, std::reference_wrapper<rule>, '.'>>;
+    butl::prefix_map<std::string, std::reference_wrapper<rule>, '.'>>;
 
   using operation_rule_map = std::unordered_map<operation_id, target_rule_map>;