diff --git a/build-constraints.yaml b/build-constraints.yaml
index 13aaf3b6..3ed9fbe4 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2454,6 +2454,7 @@ packages:
         - servant-mock < 0.8
         - servant-js < 0.8
         - language-puppet < 1.3 # Also listed for #1676
+        - lackey < 0.4.0
 
         # https://github.com/fpco/stackage/issues/1691
         - QuickCheck < 2.9