diff --git a/build-constraints.yaml b/build-constraints.yaml
index 44275d75..3dc7aba2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -5588,6 +5588,9 @@ expected-test-failures:
 
     # https://github.com/tomphp/haskell-cfenv/issues/1
     - cfenv
+
+    # https://github.com/centromere/cacophony/issues/15
+    - cacophony
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run