diff --git a/build-constraints.yaml b/build-constraints.yaml
index eead2038..1c51a499 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -5541,6 +5541,9 @@ expected-test-failures:
 
     # https://github.com/commercialhaskell/stackage/issues/4810
     - dns
+
+    # https://github.com/commercialhaskell/stackage/issues/4815
+    - brittany
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run