diff --git a/build-constraints.yaml b/build-constraints.yaml
index 8af7d2dd..25e9fcd3 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2754,6 +2754,9 @@ packages:
         # https://github.com/fpco/stackage/issues/2195
         - Unique < 0.4.6
 
+        # https://github.com/fpco/stackage/issues/2196
+        - req < 0.2.0
+
         # https://github.com/fpco/stackage/issues/2197
         - brick < 0.16