diff --git a/build-constraints.yaml b/build-constraints.yaml
index cf96c182..ffbc7ed3 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -377,6 +377,7 @@ packages:
         - Rasterific
         - svg-tree
         - rasterific-svg
+        - asciidiagram
 
     "Patrick Brisbin":
         - gravatar