diff --git a/build-constraints.yaml b/build-constraints.yaml
index 13966fe2..a659fb8c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2,6 +2,9 @@ ghc-major-version: "8.0"
 # Constraints for brand new builds
 packages:
 
+    "Richard Cook <rcook@rcook.org> @rcook":
+        - hidden-char
+
     "Vanessa McHale <tmchale@wisc.edu> @vmchale":
         - tibetan-utils