diff --git a/build-constraints.yaml b/build-constraints.yaml
index e86dd318..acae352e 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7816,6 +7816,9 @@ packages:
         - singletons-base < 3.2
         - singletons-th < 3.2
         - th-desugar < 1.15
+
+        # https://github.com/commercialhaskell/stackage/issues/6909
+        - semigroupoids < 6
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of