diff --git a/build-constraints.yaml b/build-constraints.yaml
index f4fd32f0..9a53af77 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -154,7 +154,7 @@ packages:
         - sparse-tensor
 
     "Stephan Schiffels <stephan_schiffels@mac.com> @stschiff":
-        - sequence-formats
+        - sequence-formats < 1.6.4 # https://github.com/stschiff/sequence-formats/issues/8
         - pipes-ordered-zip
         - sequenceTools