diff --git a/build-constraints.yaml b/build-constraints.yaml
index c8755938..ce47022d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -6895,6 +6895,9 @@ packages:
 
       # https://github.com/commercialhaskell/stackage/issues/5924
       - singletons < 3
+
+      # https://github.com/commercialhaskell/stackage/issues/5925
+      - th-desugar < 1.12
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of