diff --git a/build-constraints.yaml b/build-constraints.yaml
index 15627148..78c366dc 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3068,7 +3068,7 @@ packages:
         - hpio < 0 # GHC 8.4 via protolude
 
     "Richard Eisenberg <eir@cis.upenn.edu> @goldfirere":
-        - th-desugar
+        - th-desugar < 1.11 # https://github.com/commercialhaskell/stackage/issues/5260
         - singletons < 2.7 # GHC 8.10 via Cabal-3.2 & base-4.14
         - HUnit-approx
         - units-parser < 0 # BuildFailureException Process exited with ExitFailure 1: dist/build/main/main