diff --git a/build-constraints.yaml b/build-constraints.yaml
index 98a5150e..f75d3760 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -133,7 +133,7 @@ packages:
         - PyF
 
     "Erik Schnetter <schnetter@gmail.com> @eschnett":
-        - mpi-hs
+        - mpi-hs < 0 # https://github.com/commercialhaskell/stackage/issues/5278
 
     "Yang Bo <pop.atry@gmail.com> @Atry":
         - control-dsl < 0 # via doctest-discover