diff --git a/build-constraints.yaml b/build-constraints.yaml
index f72a2cc1..39000fa6 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4499,6 +4499,9 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/4441
         - checkers < 0.5.0
 
+        # https://github.com/commercialhaskell/stackage/issues/4443
+        - concurrency < 1.7
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of