diff --git a/build-constraints.yaml b/build-constraints.yaml
index ddeda3b0..e05a8431 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3042,7 +3042,7 @@ packages:
 
     "Boldizsár Németh <nboldi@elte.hu> @nboldi":
         - instance-control
-        # - references # https://github.com/nboldi/references/issues/27
+        - references
         # - haskell-tools-ast # GHC 8.2.1
         # - haskell-tools-backend-ghc # GHC 8.2.1
         # - haskell-tools-rewrite # GHC 8.2.1