diff --git a/build-constraints.yaml b/build-constraints.yaml
index e8bf85a3..fdc192b2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3872,6 +3872,9 @@ expected-test-failures:
     # https://github.com/bos/attoparsec/issues/131
     - attoparsec
 
+    # https://github.com/jdreaver/sum-type-boilerplate/issues/1
+    - sum-type-boilerplate
+
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run