diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1224ea09..52af3961 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3449,7 +3449,7 @@ packages:
         - massiv
         - massiv-io
         - massiv-test
-        - scheduler
+        - scheduler < 1.5.0 # https://github.com/commercialhaskell/stackage/issues/5720
         - Color
         - safe-decimal
         - flush-queue