diff --git a/build-constraints.yaml b/build-constraints.yaml
index c9efb6bd..c0bb9c51 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3399,6 +3399,9 @@ skipped-tests:
     # criterion
     - store
 
+    # requires custom setup?
+    - ersatz # https://github.com/fpco/stackage/issues/2508
+
 # end of skipped-tests
 
 # Tests which we should build and run, but which are expected to fail. We