diff --git a/build-constraints.yaml b/build-constraints.yaml
index 065a6e40..d0f72d3a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2864,6 +2864,9 @@ expected-test-failures:
     - stack # Permissions failure when creating /home/stackage/.stack.
     - skein # openfile: does not exist https://github.com/fpco/stackage/issues/1187
 
+    # https://github.com/paul-rouse/yesod-auth-hashdb/issues/6
+    - yesod-auth-hashdb
+
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run