diff --git a/build-constraints.yaml b/build-constraints.yaml
index e953675d..b1122ec5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1498,6 +1498,9 @@ packages:
         # https://github.com/fpco/stackage/issues/846
         - postgresql-simple < 0.5
 
+        # https://github.com/phaazon/smoothie/issues/10
+        - smoothie < 0.4.2
+
 # Package flags are applied to individual packages, and override the values of
 # global-flags
 package-flags: