diff --git a/build-constraints.yaml b/build-constraints.yaml
index 919661c0..645df0d1 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4119,8 +4119,8 @@ packages:
         - bbdb
 
     "Andrzej Rybczak <andrzej@rybczak.net> @arybczak":
-        - effectful
-        - effectful-core
+        - effectful < 2.2.2.2 # via effectful-core, https://github.com/commercialhaskell/stackage/issues/6843
+        - effectful-core < 2.2.2.2 # https://github.com/commercialhaskell/stackage/issues/6843
         - effectful-plugin < 0
         - effectful-th