diff --git a/build-constraints.yaml b/build-constraints.yaml
index 2a9ef785..f2b0e850 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3720,6 +3720,7 @@ skipped-tests:
 
     # Transitive outdated dependencies
     # These can also be checked for updates periodically.
+    - exinst # via cborg and serialise https://github.com/commercialhaskell/stackage/issues/3666 and 3667
     - MissingH # via testpack https://github.com/jgoerzen/testpack/issues/11
     - o-clock # tasty 0.12 via tasty-hedgehog
     - options # ansi-terminal-0.8 via chell