diff --git a/build-constraints.yaml b/build-constraints.yaml
index 698ab9ae..3be5a754 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2973,7 +2973,7 @@ packages:
 
     "Moritz Kiefer <moritz.kiefer@purelyfunctional.org> @cocreature":
         - lrucaching
-        - llvm-hs
+        - llvm-hs < 0 # https://github.com/commercialhaskell/stackage/issues/4238
         - llvm-hs-pure
 
     "Thierry Bourrillon <thierry.bourrillon@fpinsight.com> @tbourrillon":