diff --git a/build-constraints.yaml b/build-constraints.yaml
index c7c72c51..c8755938 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -6894,7 +6894,7 @@ packages:
       - singleton-nats < 0.4.6
 
       # https://github.com/commercialhaskell/stackage/issues/5924
-      - singletons
+      - singletons < 3
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of