diff --git a/build-constraints.yaml b/build-constraints.yaml
index 7baab0c5..54c54c9c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1842,7 +1842,7 @@ packages:
         - vector-bytes-instances
         - xmlbf-xeno
         - xmlbf-xmlhtml
-        - xmlbf
+        - xmlbf < 0.7 # https://github.com/fosskers/servant-xml/issues/6
 
     "Tomas Carnecky @wereHamster":
         - avers
@@ -8806,6 +8806,7 @@ expected-test-failures:
     - world-peace
     - xml-picklers # https://github.com/Philonous/xml-picklers/issues/5
     - xmlbf
+    - yarn-lock
     - yesod-gitrev # needs a git repo https://github.com/commercialhaskell/stackage/issues/6132
     - yesod-markdown # https://github.com/pbrisbin/yesod-markdown/issues/77
     - aws-sns-verify # https://github.com/commercialhaskell/stackage/issues/6777