diff --git a/build-constraints.yaml b/build-constraints.yaml
index 2f079d70..221dc1df 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1911,6 +1911,10 @@ packages:
         # https://github.com/fpco/stackage/issues/1128
         - machines < 0.6
 
+        # https://github.com/fpco/stackage/issues/1131
+        # https://github.com/fpco/stackage/issues/1132
+        - unordered-containers < 0.2.6
+
 # end of packages