diff --git a/build-constraints.yaml b/build-constraints.yaml
index d78875c7..0bf12345 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3443,6 +3443,9 @@ packages:
         # https://github.com/fpco/stackage/issues/3566
         - network < 2.7
 
+        # https://github.com/fpco/stackage/issues/3595
+        - unexceptionalio < 0.4
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of