diff --git a/build-constraints.yaml b/build-constraints.yaml
index 3dbf539a..c4d8d5f1 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8173,6 +8173,8 @@ packages:
         - singletons-th < 3.3
         - th-desugar < 1.16
 
+        # https://github.com/commercialhaskell/stackage/issues/7159
+        - Diff < 0.5
     # end of Stackage upper bounds
 # end of packages