diff --git a/build-constraints.yaml b/build-constraints.yaml
index ec935054..7495ea5f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2750,6 +2750,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/2194
         - vector < 0.12.0.0
+
+        # https://github.com/fpco/stackage/issues/2195
+        - Unique < 0.4.6
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of