diff --git a/build-constraints.yaml b/build-constraints.yaml
index b74f1005..d001a50d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2222,7 +2222,7 @@ packages:
         - lens-typelevel
         - list-witnesses < 0 # #5817/closed
         - nonempty-containers
-        - one-liner-instances
+        - one-liner-instances  < 0 # random 1.2 ? (maybe not, but still fails)
         - prompt
         - servant-cli
         - tagged-binary