diff --git a/build-constraints.yaml b/build-constraints.yaml
index 8fa28bfd..6c1dcd64 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -136,6 +136,7 @@ packages:
         - blaze-builder
         - netrc
         - equivalence
+        - tokenize
 
         # Some "grandfathered dependencies" I took over because I contributed to them at some time.
         # Feel free to snatch them from me!