diff --git a/build-constraints.yaml b/build-constraints.yaml
index e426d43c..e48fc5d4 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3240,6 +3240,9 @@ packages:
         # https://github.com/fpco/stackage/issues/2570
         - pandoc-citeproc < 0.10.5
 
+        # https://github.com/jaspervdj/hakyll/issues/544
+        - hakyll < 4.9.6.0
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of