diff --git a/build-constraints.yaml b/build-constraints.yaml
index 415f0579..2f1a8c98 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2966,6 +2966,7 @@ expected-test-failures:
     - haskell-names # 0.7.0 https://github.com/haskell-suite/haskell-names/issues/78
     - rematch # No issue tracker, sent e-mail to maintainer https://github.com/fpco/stackage/issues/376
     - xlsior # https://github.com/rcallahan/xlsior/issues/1
+    - hakyll # https://github.com/jaspervdj/hakyll/issues/491
 
     # Assertion failures, these can be real bugs or just limitations
     # in the test cases.