diff --git a/build-constraints.yaml b/build-constraints.yaml
index 51b1d557..c8821419 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2700,7 +2700,7 @@ packages:
         - haskell-tools-demo
         - haskell-tools-cli
         - haskell-tools-daemon
-        - haskell-tools-debug
+        # - haskell-tools-debug # https://github.com/haskell-tools/haskell-tools/issues/257
 
     "David Fisher <ddf1991@gmail.com> @ddfisher":
         - socket-activation