diff --git a/build-constraints.yaml b/build-constraints.yaml
index 08dab5e9..712d973e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3213,7 +3213,7 @@ package-flags:
         win32-2-5: true
 
     cassava:
-        pre-bytestring-0-10-4: false
+        bytestring--lt-0_10_4: false
 
     alerta:
         servant-client-core: false