diff --git a/build-constraints.yaml b/build-constraints.yaml
index e0e1ae1d..edf40c9a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3101,6 +3101,9 @@ expected-test-failures:
 
     # https://github.com/fpco/th-utilities/issues/2
     - th-utilities
+
+    # https://github.com/fpco/stackage/pull/1721
+    - pixelated-avatar-generator
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run