diff --git a/build-constraints.yaml b/build-constraints.yaml
index 48ac013f..f6c0dfe5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -757,7 +757,6 @@ packages:
         - rp-tree
         - scotty
         - xeno
-        - bytestring-mmap # 0 # 0.2.2 required by xeno # not ghc 9.6 ready
         - datasets
         - lucid-extras
         - mnist-idx-conduit