diff --git a/build-constraints.yaml b/build-constraints.yaml
index 7f14ff0b..ee399050 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -13,7 +13,7 @@ packages:
         - sparse-tensor
 
     "Stephan Schiffels <stephan_schiffels@mac.com> @stschiff":
-        # - sequence-formats https://github.com/commercialhaskell/stackage/issues/4776
+        - sequence-formats
         - pipes-ordered-zip
     
     "YongJoon Joe <developer@quietjoon.net> @QuietJoon":