diff --git a/build-constraints.yaml b/build-constraints.yaml
index 59404595..e688edb0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1247,7 +1247,7 @@ packages:
 
     "Robert Klotzner <robert.klotzner@gmx.at> @eskimor":
         - purescript-bridge
-        - servant-purescript
+        - servant-purescript < 0 # https://github.com/commercialhaskell/stackage/issues/6091
         - servant-subscriber
 
     "Rodrigo Setti <rodrigosetti@gmail.com> @rodrigosetti":