diff --git a/build-constraints.yaml b/build-constraints.yaml
index 54cd187f..7a501927 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7767,6 +7767,7 @@ expected-test-failures:
     - greskell
     - greskell-core
     - headroom
+    - heterocephalus
     - hint
     - hledger-lib
     - iproute