diff --git a/build-constraints.yaml b/build-constraints.yaml
index 7ac7fe45..9c44eb88 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -877,6 +877,8 @@ package-flags:
         old-locale: true
     tttool:
         old-locale: true
+    amazonka-core:
+        old-locale: true
 
     hxt:
         network-uri: true