diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9c1dae5a..d740c7a2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3273,6 +3273,9 @@ packages:
         # https://github.com/fpco/stackage/issues/2590
         - text-show < 3.6.2
 
+        # https://github.com/fpco/stackage/issues/2594
+        - req < 0.3.0
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of