diff --git a/build-constraints.yaml b/build-constraints.yaml
index afc14826..2f0b8ca3 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2226,6 +2226,9 @@ packages:
         - Cabal < 1.24.0.0
         - cabal-install < 1.24.0.0
 
+        # https://github.com/fpco/stackage-curator/issues/17
+        - monad-unlift < 0.2.0
+
 # end of packages