diff --git a/build-constraints.yaml b/build-constraints.yaml
index fb713411..21460358 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7786,6 +7786,9 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/6857
         - deriving-trans < 0.6
 
+        # https://github.com/commercialhaskell/stackage/issues/6880
+        - unliftio-core < 0.2.1.0
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of