diff --git a/build-constraints.yaml b/build-constraints.yaml
index 7a501927..c121ed83 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7586,6 +7586,7 @@ expected-test-failures:
     # fixed by adding these files to `extra-source-files` in the
     # .cabal file.
     #
+    - brittany # https://github.com/commercialhaskell/stackage/issues/6465
     - cpio-conduit # Test file not in tarball https://github.com/da-x/cpio-conduit/issues/1
     - crypto-pubkey # https://github.com/vincenthz/hs-crypto-pubkey/issues/23
     - doctest-discover # https://github.com/karun012/doctest-discover/issues/33