diff --git a/build-constraints.yaml b/build-constraints.yaml
index fddb334c..2512ffe0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1465,7 +1465,7 @@ packages:
 
     "George Giorgidze <giorgidze@gmail.com> @giorgidze":
         - YampaSynth < 0 # 0.2 compile fail
-        - set-monad
+        - set-monad < 0 # ambiguous foldl with text-2.1.2
 
     "Phil Hargett <phil@haphazardhouse.net> @hargettp":
         - courier