diff --git a/build-constraints.yaml b/build-constraints.yaml
index 58c0f720..73ae37a3 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3558,7 +3558,7 @@ packages:
         - distributed-process < 0 # GHC 8.4 via network-transport-tcp
         - distributed-process-lifted < 0 # GHC 8.4 via network-transport-tcp
         - distributed-process-simplelocalnet < 0 # GHC 8.4 via network-transport-tcp
-        - xxhash-ffi < 0 # GHC 8.4 via xxhash
+        # xxhash-ffi < 0 # GHC 8.4 via xxhash
 
         # transitive failures, gen 2
         - MFlow < 0 # GHC 8.4 via RefSerialize