diff --git a/build-constraints.yaml b/build-constraints.yaml
index be2a9d5f..b557fe47 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1805,6 +1805,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/992
         - safecopy < 0.9
+
+        # https://github.com/fpco/stackage/issues/1000
+        - eventstore < 0.9.1
 # end of packages