diff --git a/build-constraints.yaml b/build-constraints.yaml
index 7ceb54bb..bec4bd1e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2121,6 +2121,9 @@ expected-test-failures:
     - hworker
     - hworker-ses
 
+    # https://github.com/centromere/pipes-cacophony/issues/1
+    - pipes-cacophony
+
 # end of expected-test-failures