diff --git a/build-constraints.yaml b/build-constraints.yaml
index d9fd92222..87b27e30c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3380,6 +3380,8 @@ packages:
         - glfw-group
         - ftcqueue
         - freer-base-classes
+        - higher-order-freer-monad
+        - higher-order-open-union
 
     "Jan Gerlinger <git@jangerlinger.de> @JanGe":
         - irc-dcc