diff --git a/build-constraints.yaml b/build-constraints.yaml
index 5be260e8..3d0a59d7 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3151,7 +3151,7 @@ packages:
         - http-api-data
         - swagger2
         - telegram-bot-simple
-        - rzk
+        - rzk < 0 # https://github.com/rzk-lang/rzk/issues/186
 
     "Jared Tobin <jared@jtobin.ca> @jtobin":
         - mwc-probability