diff --git a/build-constraints.yaml b/build-constraints.yaml
index 6c88b260..75c52c08 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2972,7 +2972,7 @@ packages:
         - chronologique
         - http-common
         - http-streams
-        - locators
+        - locators < 0 # crypton-1.1 https://github.com/aesiniath/locators-haskell/issues/7
         - core-data
         - core-program
         - core-telemetry