diff --git a/build-constraints.yaml b/build-constraints.yaml
index a43e02f1..86da91bb 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4554,7 +4554,7 @@ packages:
         - blanks
         - climb
         - linenoise
-        - little-rio
+        - little-rio < 1.0.0 # https://github.com/commercialhaskell/stackage/issues/6581
         - little-logger
         # Maintainership with @23Skidoo
         - ekg