diff --git a/build-constraints.yaml b/build-constraints.yaml
index d821b545..33225b92 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4235,7 +4235,7 @@ packages:
         - haskell-lexer
         - haskell-lsp-types
         - haskell-src
-        - haskell-src-exts
+        - haskell-src-exts < 1.23 # https://github.com/commercialhaskell/stackage/issues/5048
         - haxl < 0 # via time-1.9.3
         - heap
         - hex < 0 # via base-4.13.0.0