diff --git a/build-constraints.yaml b/build-constraints.yaml
index 506112e1..63ade643 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1235,9 +1235,9 @@ packages:
         - turtle
         - foldl
         - bench
-        - dhall
-        - dhall-bash
-        - dhall-json
+        - dhall < 1.40 # https://github.com/commercialhaskell/stackage/issues/6175
+        - dhall-bash < 1.0.38 # https://github.com/commercialhaskell/stackage/issues/6175
+        - dhall-json < 1.7.8 # https://github.com/commercialhaskell/stackage/issues/6175
         - dhall-lsp-server
         - dhall-yaml
         - aeson-yaml  # req'd by dhall-json