diff --git a/build-constraints.yaml b/build-constraints.yaml
index 097e80cf..fb25b408 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1963,7 +1963,7 @@ packages:
     "Val Packett <val@packett.cool> @valpackett":
         - pcre-heavy
         - http-link-header
-        - microformats2-parser
+        - microformats2-parser < 0 # https://github.com/commercialhaskell/stackage/issues/7829
         - hspec-expectations-pretty-diff
         - wai-cli